By Saurabh Gupta
The OCP certification is the second one milestone for the skilled affiliate point Oracle pros which reinforces one's credibility in paintings atmosphere, and catalyzes your employment possibilities. The Packt's booklet Oracle complicated PL/SQL Developer specialist advisor lets you grasp the complicated PL/SQL techniques in Oracle 11g. The publication goals to be a convinced choice for the skilled Oracle execs aspiring for pro point by way of writing Oracle certification examination "1Z0-146: Oracle Database 11g: complex PL/SQL". the subjects lined within the e-book are based on the Oracle collage prescription for 1Z0-146 certification, which justify the model updates to be complicated and never complicated. The publication has been reviewed via Oracle ACEs Kamran Agayev, Ronald Rood, Mohan Dutta, and Marcel Hoefs. The booklet covers the complicated positive factors of PL/SQL that are required to layout and optimize the PL/SQL code in database purposes. The positive aspects like collections, exterior approaches, server facet outcome caching, implement row point defense utilizing VPD, dealing with huge gadgets and SecureFiles increase a concrete platform for a PL/SQL specialist. except the programming, the e-book makes instrumental tips on using improvement device SQL Developer, applying top practices in database environments and safeguarding the weak parts in PL/SQL code to prevent code injection
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Extra resources for Oracle Advanced PL/SQL Developer Professional Guide
For example, ORA-01422 is the error code for the TOO_MANY_ROWS exception whose error message is "exact fetch returns more than requested number of rows". But the name is required only in exception handlers. The PL/SQL block contains a SELECT statement which selects the name and salary of an employee whose employee ID is one of the declared variables. Note that such SELECT statements are more prone to the NO_DATA_FOUND exception. PUT_LINE ('No Employee exists with the id '||L_ EMPID); END; / No Employee exists with the id 837 PL/SQL procedure successfully completed.
Navigate to the script location and open the script. The script code would be opened in a new SQL Worksheet. Note that the worksheet's name is renamed as the actual script name. Now, the code can be executed using the Run Script icon. sql at the C:\Labs\ location contains the following SQL statement: SELECT * FROM EMPLOYEES / As shown in the following screenshot, the script has been invoked in the SQL Worksheet using SQL*Plus execute command, @: [ 20 ] Chapter 1 Creating and executing an anonymous PL/SQL block An anonymous PL/SQL block can be written and executed, as shown in the following screenshot.
32 ] Chapter 1 PL/SQL packages Packages are the database objects which behave as libraries and grounds on the principle of encapsulation and data hiding. A package is privileged to contain a variety of constructs such as subprograms, variables, cursors, exceptions, and variables. In addition, it enjoys multiple add-on features such as subprogram overloading, public and private member constructs, and so on. Standalone subprograms cannot be overloaded. Only packaged subprograms can be overloaded by virtue of their signatures.