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1Z0-101 Develop PL/SQL Program Units

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1Z0-101 exam Dumps Source : Develop PL/SQL Program Units

Test Code : 1Z0-101
Test title : Develop PL/SQL Program Units
Vendor title : Oracle
real questions : 142 true Questions

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Oracle Develop PL/SQL Program Units

Oracle's most recent PL/SQL duty 'purchasable via' | killexams.com true Questions and Pass4sure dumps

Oracle has offered packages for a long time now, however except currently or not it's been complicated, if not unimaginable, to keep away from 'out of context' execution of features and strategies; in many cases kit code is designed to be used within the context of the equipment, no longer as stand-by myself procedures and features. In unlock 12.2.0.1, Oracle has addressed this problem with the obtainable by way of clause. This clause enables developers to refine the scope of a system or feature title and generate an oversight message when that manner or feature is referred to as outside of the apparatus context. Let's construct an illustration as an instance how this is written and what consequences are acquired when the context-confined code is executed in context and out.

purchasable by means of can restrict particular types of application instruments or named application units of an unspecified type. The syntax for the clause is:

attainable by using ([unit_kind] [schema.]unit_name)

...where [unit_kind] is an non-compulsory parameter indicating system, feature, equipment, set off or classification, [schema] is the schema where the unit is observed and unit_name is the title of the technique, duty or apparatus having restrained access. When [unit_kind] is supplied then a specific package, method, function, trigger or class can handiest be referred to as or used from inside the defined context. When [unit_kind] isn't presented then any of the listed types can too be referenced provided that they've the declared unit_name. they will birth with an entry via identify example:

SQL> -- SQL> -- Create a manner best attainable SQL> -- by a named itemSQL> -- SQL> -- expostulate can believe any supported type SQL> -- SQL> create or change procedure my_restrict_proc 2 available by (restrict_fc) 3 as 4 start 5 dbms_output.put_line('accomplished my_restrict_proc.'); 6 conclusion; 7 / procedure created. SQL> SQL> -- SQL> -- Create a duty handiest attainable SQL> -- by way of a triggerSQL> -- SQL> create or exchange characteristic top_protected_f revert number 2 accessible by using (set off restrict_fc ) as 3 begin 4 revert 1.27349; 5 finish top_protected_f; 6 / feature created. SQL> SQL> -- SQL> -- Create a feature SQL> -- SQL> -- duty calls the technique that can call SQL> -- the unit having the confined nameSQL> -- SQL> create or substitute characteristic restrict_fc revert quantity AUTHID DEFINER IS 2 duty g revert quantity DETERMINISTIC IS 3 begin 4 revert 1.27349; 5 conclusion g; 6 begin 7 my_restrict_proc; eight revert g() - DBMS_RANDOM.cost(); 9 finish restrict_fc; 10 / function created. SQL> SQL> -- SQL> -- Execute the characteristic SQL> -- SQL> select restrict_fc FROM dual; RESTRICT_FC ----------- .78662621 performed my_restrict_proc. SQL>

since they did not try to skip the 'security' they worked to enforce the restrained code completed devoid of error. note that they weren't required to declare any unit_kind within the initial attainable by way of clause, which allowed us to declare the unit_kind in an additional PL/SQL application unit 'down the road'; this makes it less complicated in applications to jot down an accessible by means of clause that can too be reused in other packages or stand-on my own strategies that utilize objects of the identical title but having different unit_kind definitions.

Let's now analyze a package that contains both public (executable by any person in any context) and private (executable simplest by the declared software unit) tactics and spot what occurs when an attempt is made to execute the 'inner most' procedure outside of its declared context:

SQL> SQL> set resound on linesize a hundred and fifty serveroutput on dimension one million SQL> SQL> -- SQL> -- Create a kit with public and personal procedures SQL> -- SQL> create or substitute package my_top_lvl_pkg as 2 method my_first_lvl_proc; 3 method my_next_lvl_proc obtainable by (system my_top_lvl_proc); 4 conclusion my_top_lvl_pkg; 5 / package created. SQL> SQL> display errors No blunders. SQL> SQL> -- SQL> -- silhouette those techniques and who/what can entry them SQL> -- SQL> create or substitute apparatus physique my_top_lvl_pkg 2 as three process my_first_lvl_proc as four start 5 dbms_output.put_line('done my_top_lvl_pkg.my_first_lvl_proc'); 6 end; 7 method my_next_lvl_proc purchasable by using (method my_top_lvl_proc) as 8 begin 9 dbms_output.put_line('achieved my_top_lvl_pkg.my_next_lvl_proc'); 10 conclusion; eleven conclusion; 12 / kit carcass created. SQL> SQL> disclose error No blunders. SQL> SQL> -- SQL> -- Create procedure to execute each kit approaches SQL> -- SQL> create or supersede procedure my_top_lvl_proc 2 as three begin 4 dbms_output.put_line('my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc '); 5 my_top_lvl_pkg.my_next_lvl_proc; 6 conclusion; 7 / procedure created. SQL> SQL> exhibit errors No error. SQL> SQL> -- SQL> -- Execute approaches as supposed, from inside the kit SQL> -- SQL> exec my_top_lvl_proc; my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc achieved my_top_lvl_pkg.my_next_lvl_proc PL/SQL manner efficaciously completed. SQL> SQL> SQL> -- SQL> -- are attempting to title protected process stand-alone SQL> -- SQL> exec my_top_lvl_pkg.my_next_lvl_proc; start my_top_lvl_pkg.my_next_lvl_proc; conclusion; * ERROR at line 1: ORA-06550: line 1, column 7: PLS-00904: inadequate privilege to entry expostulate MY_NEXT_LVL_PROC SQL>

We remark that any try and execute MY_NEXT_LVL_PROC by way of itself generates an error, which keeps it within the desired context so that undesired consequences can't be generated. [As mentioned before some procedures and functions in a package can reliance on variables and intermediate results generated by program units within that package; executing program units with such dependencies as 'stand-alone' program units can bear incorrect results.]

Being able to preclude the execution ambiance on PL/SQL software units that depend on several conditions to be met is a protracted late feature that should be investigated and used with the aid of builders. not will programmers believe to clarify why a technique or duty would not drudgery accurately when called outdoor of its putative atmosphere; it effortlessly may not execute outdoor of the mandatory context. And, to cite Martha Stewart, "it really is an excellent aspect."

See sum articles with the aid of David Fitzjarrell


ideas for Unit trying out PL/SQL classes | killexams.com true Questions and Pass4sure dumps

I even believe currently received a few requests for ideas concerning unit trying out of PL/SQL programs. i thought i might partake with you what I told them.

First, some history: unit testing refers back to the technique of trying out individual subprograms for correctness, as antagonistic to typical utility testing (which, at the present time, almost always means journeying a site).

The basic theory in the back of unit testing is that if you examine that each and every particular person subprogram works appropriately, you then are plenty less likely to believe bugs in larger-degree courses that summon those established subprograms. And in the event you do, you know which you could focal point on the style the verified subprograms are used, and never the subprograms themselves.

probably the most vital software of a unit check is to prefer section in a regression examine, which can be speed to check one's code works these days as neatly as it did the previous day. that will significantly Cut back the probability of you upgrading the utility and clients complaining that a bunch of features that labored in V1.2 not drudgery within the fancy, new-and-greater V1.3.

this is sum the time embarrassing, appropriate?

When developers talk about unit testing, they are continually now not just speaking about writing and operating a test. they're speaking about finding and the usage of a framework that automates as much of the process as possible. Automation is essential as a result of testing always takes a lot of time and manual trying out takes essentially the most time of all.

And, most dev managers aren't going to provide you with loads of time for checking out. it truly is just the style it's.

here are the leading steps that may well be automated:

  • define the examine circumstances: what are the a number of eventualities that requisite to be established? These are driven by person requirements.
  • build the code that implements the examine cases.
  • install the information so that the test code will speed thoroughly.
  • Run the checks.
  • listing and determine the effects.
  • There are a number of different tools attainable for automatic or semi-computerized unit testing of PL/SQL code. They consist of:

  • utPLSQL: "Junit for PL/SQL" an open source framework that I firstly in-built 1999 and is now managed by using Paul Walker.
  • SQL Developer Unit trying out: Oracle's free PL/SQL IDE presents built-in unit testing.
  • Dell Code Tester for Oracle: a commercial unit trying out device that I at the start designed and helped to build, sold as a section of the Toad evolution Suite for Oracle.
  • and then there are a bunch of others, including: DBFit, PL/unit, PLUTO, and ruby-plsql to title a few. i'm not going to counterfeit that I believe any top notch familiarity with this record of "others." I animate you to determine them out; i am going to hub of attention on the great Three. [Note: PL/SQL Developer, another well-liked PL/SQL IDE, has some very basic unit testing features, but not enough to warrant review in this post.]

    And even there, i am not going to present a circumstantial comparison of aspects. you'll should conclude this your self, in keeping with your requirements. in its place, i will prefer a step lower back and present some excessive-degree assistance to bag you began to your adventure.

    utPLSQL

    First, it's crucial to proper a misunderstanding that some americans believe and the creator of ruby-plsql repeats in his blog: "Steven stopped establishing extra utPLSQL and at the instant there are no different lively maintainers of this project." Raimonds is fully confiscate that i stopped working on utPLSQL years in the past, and for a long time, it did languish. 

    last yr, despite the fact, Paul Walker stepped up to the plate and took over managing the undertaking. He has been making utilize of worm fixes, enhancing documentation, and encouraging discussion and collaboration.

    given that 2006, utPLSQL has been downloaded over 76,000 instances. Of route, there is no way of realizing how many dev teams utilize it, but I suppose it's protected to title there are a total bunch of corporations sum over actively counting on utPLSQL.

    utPLSQL is free and provides you complete manage over your check code. but, it really is typically since you should write all of the gawk at various code (SQL Developer and Code Tester generate check code for you). after which, you requisite to preserve sum that verify code. but when you've written your assessments, built across the utPLSQL API, which you could execute your tests with a unique command, and utPLSQL will inform you no matter if or no longer your code handed (with unit testing, passing comes with 100% correctness).

    utPLSQL verify scripts may too be integrated into continuous integration scripting.

    Code Tester for Oracle

    I feel that it is safe to claim, even given my most likely doubly-subjective viewpoint of (a) being an original designer of Code Tester and (b) now working for "the competition" – Oracle, that Code Tester is probably the most refined computerized trying out implement for PL/SQL. it be packed crammed with features, handles a lot of intricate scenarios (for example, in case your parameter is a set of records and the record consists of a collection of objects, that you may correct interior the UI deliver values for that parameter), generates check code from your requirements, and presents restrained integration with Toad.

    That sophistication comes, youngsters, at a steep fee, particularly $2,854 for the Toad building Suite for Oracle. You can't buy Code Tester with the aid of itself.

    So, here's my recommendation: when you are licensed to Make utilize of the Toad evolution Suite for Oracle (in spite of the fact that you only utilize Toad, you may too believe a license to TDSO by the utilize of a website license, and never even realize it), you owe it to your self and your team to prefer a gawk at Code Tester. 

    you'll probably speed into some frustrations and limitations, but it surely does plenty of the heavy lifting for you.

    Code Tester tests can be integrated into continuous integration scripting via a PL/SQL API.

    SQL Developer Unit checking out

    last and definitely now not least, is the unit trying out characteristic integrated at once into SQL Developer. Let's cease confiscate there to Make positive you appreciate what I simply mentioned:

    The automated unit testing duty of SQL Developer is no longer a sever device from the editor (which is the case with Code Tester—it is exterior to Toad, with simplest minimal integration points). it's a half of SQL Developer. this is, I accept as rectify with, an vital aspect as a result of developers conclude not relish to vanish away their editors. in its place, they requisite sum integral performance delivered to them inner their editors.

    here is one screenshot from the doc to give you a sense of the integration:

    in lots of approaches, SQL Developer Unit testing and Code Tester for Oracle are an identical. They each end to prefer the trial off of you for writing test code. in its place, you describe the gawk at various case: What are the input values? What records needs to be deploy? most importantly, what are the expected consequences?

    SQL Developer then generates code that implements your check case. if you should trade the test, you would not believe to adjust verify code (as you can conclude with utPLSQL), you vanish into the UI, Make a change, and speed your test once more.

    SQL Dev unit exams can too be integrated into ceaseless integration scripting.

    So here's my advice: 

    if you are already the utilize of SQL Developer, the decision should be clear. are trying the integrated unit testing elements. remark if it meets your needs (at the least adequate to bag you going, constructing some exams, experiencing the nice feedback loop). 

    in case you aren't a SQL Developer consumer, as an specimen you employ Toad or PL/SQL Developer, and too you are not more likely to bag access to Code Tester for Oracle, then I too betoken you installation SQL Developer and check out its unit testing aspects. certain, it might be improved to simply utilize one IDE, but if the automatic trying out of SQL Dev works for you, given its infinitely not pricey (as in, free), i might suppose you may justify having that second IDE round fully for trying out.

    normal Conclusions

    when you believe access to an IDE that presents computerized unit checking out, together with the technology of check code from check case requirements, are trying that first. The productiveness trustworthy points of gawk at various code technology are so huge, it could easily be expense accepting some obstacles.

    when you are allergic to UI-based trying out and/or be troubled about being confined by way of an IDE's feature set (in different words, you are a command line fanatic), utPLSQL offers a magnificent option. or not it's proven to be profitable to lots of and perhaps thousands of dev teams over the years. it is an actively maintained and greater open supply challenge.

    Your event?

    Do you utilize an automated checking out framework for PL/SQL? Or believe you developed your personal? please disclose us about your personal event.


    PL/SQL (procedural language extension to Structured question Language) | killexams.com true Questions and Pass4sure dumps

    In Oracle database management, PL/SQL is a procedural language extension to Structured question Language (SQL). The purpose of PL/SQL is to combine database language and procedural programming language. The primary unit in PL/SQL is referred to as a shroud and is made up of three materials: a declarative part, an executable section and an exception-building half.

    because PL/SQL allows for clients to fuse SQL statements with procedural constructs, it is viable to utilize PL/SQL blocks and subprograms to community SQL statements before sending them to Oracle for execution. devoid of PL/SQL, Oracle requisite to manner SQL statements one at a time. In a community environment, this can move site visitors trail and deliberate down response time. PL/SQL blocks will too be compiled as soon as and kept in executable kindhearted to better response time.

    A PL/SQL application that is stored in a database in compiled kindhearted and can be known as with the aid of identify is referred to as a saved technique. A PL/SQL stored system it's implicitly started when an INSERT, update or DELETE statement is issued in opposition t an associated table is called a set off.

    How PL/SQL works

    PL/SQL blocks are described via the keyword phrases DECLARE, begin, EXCEPTION and end, which divide the shroud prerogative into a declarative part, an executable section and an exception-constructing part, respectively. The announcement section of the shroud is used to define and initialize constants and variables; if a variable is not initialized, it's going to default to NULL value. Blocks may too be nested and submitted to interactive equipment, relish SQL*Plus.

    learn the basics of PL/SQL programming.

    PL/SQL is designed to compute and revert a unique scalar cost or a unique assortment, equivalent to a nested table or VARRAY. clients can create their personal functions to complement those supplied by using Oracle. whereas capabilities may too be used in an SQL statement, procedures cannot.

    Examples of PL/SQL elements

    Examples of PL/SQL points encompass cursors, embedded PL/SQL and calling a saved manner.

    Cursors act as tips to the context area. A PL/SQL shroud uses a cursor to exploit the context enviornment. Cursors can continue to be unnamed or nameless, but named cursors Make retrieval more convenient. Cursors can too be implicit or explicit. Implicit cursors are the default cursors in PL/SQL blocks. they're created in lieu of an specific cursor, when PL/SQL encounters a select commentary that returns only one row or when records manipulation language statements, relish DELETE, INSERT or update, are encountered. specific cursors supply clients superior manage over the context region and should be used with a opt for observation question if you want to revert a yoke of row. each express and implicit cursors believe the very output, even though their entry is diverse.

    PL/SQL can too be embedded in excessive-degree host languages, relish C. Programming tools, relish seasoned*COBOL, interpret PL/SQL blocks as single, embedded SQL statements. This allows users to state PL/SQL blocks any state in a number application where they might continuously vicinity an SQL observation. When embedding PL/SQL blocks into host classes, Make positive to declare the variables that will be shared with PL/SQL and bracket the PL/SQL shroud with the EXEC SQL EXECUTE and conclusion-EXEC keywords, in response to Oracle documentation.

    After a Java saved process has been loaded and posted, clients can summon it. clients can hook up with Oracle with the professional*C software. once the proper statistics is entered, the software will immediately apportion sum row values within the index-by way of tables to corresponding facets in the host arrays. The application will repeatedly summon the manner and display each and every batch of information until no greater facts is found, based on Oracle's PL/SQL user's e bespeak and Reference release 2 (9.2).

    merits of PL/SQL

    PL/SQL is compatible with SQL. as a result of this taut integration of both programs, PL/SQL allows users to utilize sum SQL facts manipulation, cursor manage, transaction statements and sum other SQL functions, operators and pseudo-columns. users don't seem to be required to transform between PL/SQL and SQL statistics forms. moreover, PL/SQL supports each static and dynamic SQL.

    PL/SQL makes it feasible for users to ship a shroud of statements to the database, which greatly reduces site visitors between the app and the database. it is additionally feasible to speed PL/SQL on any operating device (OS) or platform where Oracle Database runs.

    When saved in subprograms, PL/SQL increases scalability with the aid of centralizing entry processing on the database server. The reminiscence amenities of the shared server enable Oracle Database to relieve several concurrent clients on a unique node, according to Oracle.

    clients can hold only one replica of a subprogram on the database server in its state of assorted copies on every client gadget. This increases manageability. Many apps can utilize the subprograms, and users can alter them without affecting the apps that utilize them.

    PL/SQL additionally enables users to create functions that generate webpages directly from the database. This enables users to Make their databases available on the net.

    PL/SQL Server Pages allow clients to expand webpages and are an alternative to coding a kept subprogram that writes the HTML code one line at a time. sum through construction, PL/SQL Server Pages are used as templates, and clients can design layouts and write PL/SQL scripts to generate the content material.

    PL/SQL vs. SQL

    unlike SQL, PL/SQL is fully unique to Oracle, although it is never an industry regular, as no different product makes utilize of it. PL/SQL is akin to nonobject-oriented procedural programming languages, relish C or Pascal, and its roots hint lower back to Ada.

    SQL and PL/SQL are tremendously diverse programming languages. even though it is proscribed, SQL allows clients to without retard believe interaction with a database. users are capable of utilize SQL to exploit objects and records, but SQL would not encompass loops or IF/THEN statements. PL/SQL contains the entire aspects of programming languages and integrates readily with SQL.

    The differences between PL/SQL and SQL 6 essential distinctions between PL/SQL and SQL

    while SQL is regarded a source of information for studies, webpages and screens, PL/SQL is considered as an utility language corresponding to Java and personal home page. PL/SQL can too be used to construct, format and disclose reviews, webpages and screens.


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    Develop PL/SQL Program Units

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    Oracle's Newest PL/SQL Feature 'ACCESSIBLE BY' | killexams.com true questions and Pass4sure dumps

    Oracle has offered packages for a while now, but until recently it's been difficult, if not impossible, to preclude 'out of context' execution of functions and procedures; in many cases package code is designed to be used within the context of the package, not as stand-alone procedures and functions. In release 12.2.0.1, Oracle has addressed this issue with the ACCESSIBLE BY clause. This clause allows developers to refine the scope of a procedure or duty summon and generate an oversight message when that procedure or duty is called outside of the package context. Let's build an specimen to illustrate how this is written and what results are obtained when the context-restricted code is executed in context and out.

    ACCESSIBLE BY can restrict specific types of program units or named program units of an unspecified type. The syntax for the clause is:

    ACCESSIBLE BY ([unit_kind] [schema.]unit_name)

    ...where [unit_kind] is an optional parameter indicating PROCEDURE, FUNCTION, PACKAGE, TRIGGER or TYPE, [schema] is the schema where the unit is located and unit_name is the title of the procedure, duty or package having restricted access. When [unit_kind] is supplied then a particular package, procedure, function, trigger or type can only be called or used from within the defined context. When [unit_kind] is NOT supplied then any of the listed types can be referenced as long as they believe the declared unit_name. We'll start with an access by title example:

    SQL> -- SQL> -- Create a procedure only accessible SQL> -- by a named object SQL> -- SQL> -- expostulate can believe any supported type SQL> -- SQL> create or supersede procedure my_restrict_proc 2 accessible by (restrict_fc) 3 as 4 begin 5 dbms_output.put_line('Executed my_restrict_proc.'); 6 end; 7 / Procedure created. SQL> SQL> -- SQL> -- Create a duty only accessible SQL> -- by a trigger SQL> -- SQL> create or supersede duty top_protected_f revert number 2 accessible by (trigger restrict_fc ) as 3 begiN 4 revert 1.27349; 5 finish top_protected_f; 6 / Function created. SQL> SQL> -- SQL> -- Create a function SQL> -- SQL> -- duty calls the procedure that can call SQL> -- the unit having the restricted name SQL> -- SQL> create or supersede duty restrict_fc revert NUMBER AUTHID DEFINER IS 2 duty g revert NUMBER DETERMINISTIC IS 3 BEGIN 4 revert 1.27349; 5 finish g; 6 BEGIN 7 my_restrict_proc; 8 revert g() - DBMS_RANDOM.VALUE(); 9 finish restrict_fc; 10 / Function created. SQL> SQL> -- SQL> -- Execute the duty SQL> -- SQL> SELECT restrict_fc FROM DUAL; RESTRICT_FC ----------- .78662621 Executed my_restrict_proc. SQL>

    Since they didn't try to bypass the 'security' they worked to implement the restricted code executed without error. Notice that they weren't required to declare any unit_kind in the initial ACCESSIBLE BY clause, which allowed us to declare the unit_kind in another PL/SQL program unit 'down the line'; this makes it easier in packages to write an ACCESSIBLE BY clause that can be reused in other packages or stand-alone procedures that utilize objects of the very title but having different unit_kind definitions.

    Let's now gawk at a package that contains both public (executable by anyone in any context) and private (executable only by the declared program unit) procedures and remark what happens when an attempt is made to execute the 'private' procedure outside of its declared context:

    SQL> SQL> set resound on linesize 150 serveroutput on size 1000000 SQL> SQL> -- SQL> -- Create a package with public and private procedures SQL> -- SQL> create or supersede package my_top_lvl_pkg as 2 procedure my_first_lvl_proc; 3 procedure my_next_lvl_proc accessible by (procedure my_top_lvl_proc); 4 finish my_top_lvl_pkg; 5 / Package created. SQL> SQL> demonstrate errors No errors. SQL> SQL> -- SQL> -- Define those procedures and who/what can access them SQL> -- SQL> create or supersede package carcass my_top_lvl_pkg 2 as 3 procedure my_first_lvl_proc as 4 begin 5 dbms_output.put_line('Executed my_top_lvl_pkg.my_first_lvl_proc'); 6 end; 7 procedure my_next_lvl_proc accessible by (procedure my_top_lvl_proc) as 8 begin 9 dbms_output.put_line('Executed my_top_lvl_pkg.my_next_lvl_proc'); 10 end; 11 end; 12 / Package carcass created. SQL> SQL> demonstrate errors No errors. SQL> SQL> -- SQL> -- Create procedure to execute both package procedures SQL> -- SQL> create or supersede procedure my_top_lvl_proc 2 as 3 begin 4 dbms_output.put_line('my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc '); 5 my_top_lvl_pkg.my_next_lvl_proc; 6 end; 7 / Procedure created. SQL> SQL> demonstrate errors No errors. SQL> SQL> -- SQL> -- Execute procedures as intended, from within the package SQL> -- SQL> exec my_top_lvl_proc; my_top_lvl_proc calls my_top_lvl_pkg.my_next_lvl_proc Executed my_top_lvl_pkg.my_next_lvl_proc PL/SQL procedure successfully completed. SQL> SQL> SQL> -- SQL> -- Try to summon protected procedure stand-alone SQL> -- SQL> exec my_top_lvl_pkg.my_next_lvl_proc; BEGIN my_top_lvl_pkg.my_next_lvl_proc; END; * ERROR at line 1: ORA-06550: line 1, column 7: PLS-00904: insufficient privilege to access expostulate MY_NEXT_LVL_PROC SQL>

    We remark that any attempt to execute MY_NEXT_LVL_PROC by itself generates an error, which keeps it in the desired context so that undesired results cannot be generated. [As mentioned before some procedures and functions in a package can reliance on variables and intermediate results generated by program units within that package; executing program units with such dependencies as 'stand-alone' program units can bear incorrect results.]

    Being able to restrict the execution environment on PL/SQL program units that reliance on certain conditions to be met is a long overdue feature that should be investigated and used by developers. No longer will programmers believe to define why a procedure or duty doesn't drudgery properly when called outside of its intended environment; it simply won't execute outside of the required context. And, to quote Martha Stewart, "That's a trustworthy thing."

    See sum articles by David Fitzjarrell


    Recommendations for Unit Testing PL/SQL Programs | killexams.com true questions and Pass4sure dumps

    I believe recently received a yoke of requests for recommendations regarding unit testing of PL/SQL programs. I thought I would partake with you what I told them.

    First, some background: unit testing refers to the process of testing individual subprograms for correctness, as opposed to overall application testing (which, these days, almost always means visiting a website).

    The basic thought behind unit testing is that if you verify that each individual subprogram works correctly, then you are much less likely to believe bugs in higher-level programs that summon those tested subprograms. And when you do, you know you can focus on the way the tested subprograms are used, and not the subprograms themselves.

    The most vital application of a unit test is to participate in a regression test, which can be speed to verify one's code works today as well as it did yesterday. That will greatly reduce the casual of you upgrading the application and users complaining that a bunch of features that worked in V1.2 no longer drudgery in the fancy, new-and-improved V1.3.

    That's always embarrassing, right?

    When developers talk about unit testing, they are usually not just talking about writing and running a test. They are talking about finding and using a framework that automates as much of the process as possible. Automation is key because testing always takes a lot of time and manual testing takes the most time of all.

    And, most dev managers are not going to give you lots of time for testing. That's just the way it is.

    Here are the main steps that could be automated:

  • Define the test cases: what are the various scenarios that requisite to be verified? These are driven by user requirements.
  • Build the code that implements the test cases.
  • Set up the data so that the test code will speed properly.
  • Run the tests.
  • Record and examine the results.
  • There are a number of different tools available for automated or semi-automated unit testing of PL/SQL code. They include:

  • utPLSQL: "Junit for PL/SQL" an open source framework that I originally built in 1999 and is now managed by Paul Walker.
  • SQL Developer Unit Testing: Oracle's free PL/SQL IDE offers integrated unit testing.
  • Dell Code Tester for Oracle: a commercial unit testing implement that I originally designed and helped to build, sold as section of the Toad evolution Suite for Oracle.
  • And then there are a bunch of others, including: DBFit, PL/unit, PLUTO, and ruby-plsql to title a few. I am not going to counterfeit that I believe any majestic familiarity with this list of "others." I animate you to check them out; I am going to focus on the substantial Three. [Note: PL/SQL Developer, another well-liked PL/SQL IDE, has some very basic unit testing features, but not enough to warrant review in this post.]

    And even there, I am not going to present a circumstantial comparison of features. You will requisite to conclude that yourself, based on your requirements. Instead, I will prefer a step back and present some high-level guidance to bag you started on your journey.

    utPLSQL

    First, it is vital to rectify a misunderstanding that some people believe and the creator of ruby-plsql repeats in his blog: "Steven stopped developing further utPLSQL and currently there are no other lively maintainers of this project." Raimonds is absolutely rectify that I stopped working on utPLSQL years ago, and for a while, it did languish. 

    Last year, however, Paul Walker stepped up to the plate and took over managing the project. He has been applying bug fixes, improving documentation, and encouraging discussion and collaboration.

    Since 2006, utPLSQL has been downloaded over 76,000 times. Of course, there's no way of knowing how many dev teams utilize it, but I believe it is safe to instruct there are hundreds of groups around the world actively relying on utPLSQL.

    utPLSQL is free and gives you total control over your test code. But, that's mostly because you believe to write all the test code (SQL Developer and Code Tester generate test code for you). And then, you believe to maintain sum that test code. But once you've written your tests, built around the utPLSQL API, you can execute your tests with a unique command, and utPLSQL will disclose you whether or not your code passed (with unit testing, passing comes with 100% correctness).

    utPLSQL test scripts can be integrated into continuous integration scripting.

    Code Tester for Oracle

    I believe that it is safe to say, even given my perhaps doubly-subjective perspective of (a) being an original designer of Code Tester and (b) now working for "the competition" – Oracle, that Code Tester is the most sophisticated automated testing implement for PL/SQL. It's packed plenary of features, handles lots of intricate scenarios (for example, if your parameter is a collection of records and the record contains a collection of objects, you can right inside the UI provide values for that parameter), generates test code from your specifications, and offers limited integration with Toad.

    That sophistication comes, however, at a steep price, namely $2,854 for the Toad evolution Suite for Oracle. You can't buy Code Tester by itself.

    So, here's my recommendation: if you are licensed to utilize the Toad evolution Suite for Oracle (even if you only utilize Toad, you may believe a license to TDSO via a site license, and not even know it), you owe it to yourself and your team to check out Code Tester. 

    You will likely speed into some frustrations and limitations, but it does an abominable lot of the heavy lifting for you.

    Code Tester tests can be integrated into continuous integration scripting via a PL/SQL API.

    SQL Developer Unit Testing

    Last and definitely not least, is the unit testing feature integrated directly into SQL Developer. Let's desist prerogative there to Make positive you appreciate what I just said:

    The automated unit testing feature of SQL Developer is not a sever implement from the editor (which is the case with Code Tester—it is external to Toad, with only minimal integration points). It is a part of SQL Developer. This is, I believe, a crucial point because developers conclude not relish to leave their editors. Instead, they want sum necessary functionality brought to them inside their editors.

    Here is one screenshot from the doc to give you a sense of the integration:

    In many ways, SQL Developer Unit Testing and Code Tester for Oracle are similar. They both level to prefer the trial off of you for writing test code. Instead, you describe the test case: What are the input values? What data needs to be set up? Most importantly, what are the expected outcomes?

    SQL Developer then generates code that implements your test case. If you requisite to change the test, you don't believe to modify test code (as you would conclude with utPLSQL), you vanish into the UI, Make a change, and speed your test again.

    SQL Dev unit tests can too be integrated into continuous integration scripting.

    So here's my recommendation: 

    If you are already using SQL Developer, the decision should be clear. Try the integrated unit testing features. remark if it meets your needs (at least enough to bag you going, building some tests, experiencing the positive feedback loop). 

    If you are not a SQL Developer user, let's instruct you utilize Toad or PL/SQL Developer, and you are not likely to bag access to Code Tester for Oracle, then I too insinuate you install SQL Developer and try its unit testing features. Sure, it would be better to just utilize one IDE, but if the automated testing of SQL Dev works for you, given its infinitely low cost (as in, free), I would believe you could justify having that second IDE around solely for testing.

    Overall Conclusions

    If you believe access to an IDE that offers automated unit testing, including the generation of test code from test case specifications, try that first. The productivity gains of test code generation are so massive, it can easily be worth accepting some limitations.

    If you are allergic to UI-based testing and/or worry about being constrained by an IDE's feature set (in other words, you are a command line fanatic), utPLSQL offers a powerful alternative. It's proven to be useful to hundreds and maybe thousands of dev teams over the years. It is an actively maintained and enhanced open source project.

    Your Experience?

    Do you utilize an automated testing framework for PL/SQL? Or believe you built your own? please disclose us about your own experience.


    PL/SQL (procedural language extension to Structured Query Language) | killexams.com true questions and Pass4sure dumps

    In Oracle database management, PL/SQL is a procedural language extension to Structured Query Language (SQL). The purpose of PL/SQL is to combine database language and procedural programming language. The basic unit in PL/SQL is called a shroud and is made up of three parts: a declarative part, an executable section and an exception-building part.

    Because PL/SQL enables users to fuse SQL statements with procedural constructs, it is feasible to utilize PL/SQL blocks and subprograms to group SQL statements before sending them to Oracle for execution. Without PL/SQL, Oracle must process SQL statements one at a time. In a network environment, this can move traffic stream and deliberate down response time. PL/SQL blocks can be compiled once and stored in executable form to better response time.

    A PL/SQL program that is stored in a database in compiled form and can be called by title is referred to as a stored procedure. A PL/SQL stored procedure that is implicitly started when an INSERT, UPDATE or DELETE statement is issued against an associated table is called a trigger.

    How PL/SQL works

    PL/SQL blocks are defined by the keywords DECLARE, BEGIN, EXCEPTION and END, which divide the shroud into a declarative part, an executable section and an exception-building part, respectively. The declaration section of the shroud is used to define and initialize constants and variables; if a variable is not initialized, it will default to NULL value. Blocks can be nested and submitted to interactive tools, relish SQL*Plus.

    Learn the basics of PL/SQL programming.

    PL/SQL is designed to compute and revert a unique scalar value or a unique collection, such as a nested table or VARRAY. Users can create their own functions to supplement those provided by Oracle. While functions can be used in an SQL statement, procedures cannot.

    Examples of PL/SQL features

    Examples of PL/SQL features involve cursors, embedded PL/SQL and calling a stored procedure.

    Cursors act as pointers to the context area. A PL/SQL shroud uses a cursor to control the context area. Cursors can remain unnamed or anonymous, but named cursors Make retrieval easier. Cursors can be implicit or explicit. Implicit cursors are the default cursors in PL/SQL blocks. They are created in lieu of an specific cursor, when PL/SQL encounters a SELECT statement that returns just one row or when data manipulation language statements, relish DELETE, INSERT or UPDATE, are encountered. specific cursors concede users better control over the context region and should be used with a SELECT statement query that will revert more than one row. Both specific and implicit cursors believe the very output, even though their access is different.

    PL/SQL can be embedded in high-level host languages, relish C. Programming tools, relish Pro*COBOL, interpret PL/SQL blocks as single, embedded SQL statements. This enables users to state PL/SQL blocks anywhere in a host program where they might normally state an SQL statement. When embedding PL/SQL blocks into host programs, be positive to declare the variables that will be shared with PL/SQL and bracket the PL/SQL shroud with the EXEC SQL EXECUTE and END-EXEC keywords, according to Oracle documentation.

    After a Java stored procedure has been loaded and published, users can summon it. Users can connect to Oracle with the Pro*C program. Once the proper data is entered, the program will automatically apportion sum row values in the index-by tables to corresponding elements in the host arrays. The program will repeatedly summon the procedure and display each batch of data until no more data is found, according to Oracle's PL/SQL User's lead and Reference Release 2 (9.2).

    Advantages of PL/SQL

    PL/SQL is compatible with SQL. Because of this taut integration of the two programs, PL/SQL enables users to utilize sum SQL data manipulation, cursor control, transaction statements and sum other SQL functions, operators and pseudo-columns. Users aren't required to transmogrify between PL/SQL and SQL data types. Additionally, PL/SQL supports both static and dynamic SQL.

    PL/SQL enables users to transmit a shroud of statements to the database, which significantly reduces traffic between the app and the database. It is too feasible to speed PL/SQL on any operating system (OS) or platform where Oracle Database runs.

    When stored in subprograms, PL/SQL increases scalability by centralizing access processing on the database server. The remembrance facilities of the shared server enable Oracle Database to back multiple concurrent users on a unique node, according to Oracle.

    Users can maintain only one copy of a subprogram on the database server instead of multiple copies on each client system. This increases manageability. Many apps can utilize the subprograms, and users can alter them without affecting the apps that utilize them.

    PL/SQL too enables users to create applications that generate webpages directly from the database. This enables users to Make their databases available on the web.

    PL/SQL Server Pages enable users to develop webpages and are an alternative to coding a stored subprogram that writes the HTML code one line at a time. During development, PL/SQL Server Pages are used as templates, and users can design layouts and write PL/SQL scripts to generate the content.

    PL/SQL vs. SQL

    Unlike SQL, PL/SQL is completely unique to Oracle, although it isn't an industry standard, as no other product uses it. PL/SQL is similar to nonobject-oriented procedural programming languages, relish C or Pascal, and its roots track back to Ada.

    SQL and PL/SQL are significantly different programming languages. Although it is limited, SQL enables users to directly interact with a database. Users are able to utilize SQL to exploit objects and data, but SQL doesn't involve loops or IF/THEN statements. PL/SQL includes sum the features of programming languages and integrates easily with SQL.

    The differences between PL/SQL and SQL 6 vital distinctions between PL/SQL and SQL

    While SQL is considered a source of data for reports, webpages and screens, PL/SQL is viewed as an application language similar to Java and PHP. PL/SQL can be used to build, format and display reports, webpages and screens.



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    NI [1 Certification Exam(s) ]
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    References :


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