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Overview of PL/SQL

Overview of PL/SQL. Oracle Complete Solution. Web-based applications. Multitier applications. Applications HR Financials Manufacturing. Oracle Developer. Oracle Discoverer. Oracle Designer. SQL* Plus. SQL. PL/SQL. Oracle Database. Data dictionary. Data tables.

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Overview of PL/SQL

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  1. Overview of PL/SQL

  2. Oracle Complete Solution Web-based applications Multitier applications Applications HR Financials Manufacturing ... Oracle Developer Oracle Discoverer Oracle Designer SQL* Plus SQL PL/SQL Oracle Database Data dictionary Data tables

  3. PL/SQL Program Constructs Stored procedure/function Anonymousblock DECLARE BEGIN Applicationprocedure/function Applicationtrigger EXCEPTION END; Databasetrigger Package Object type

  4. Block Structure for Anonymous PL/SQL Blocks DECLARE (optional) Declare PL/SQL objects to be used within this block BEGIN (mandatory) Define the executable statements EXCEPTION (optional) Define the actions that take place if an error arises END; (mandatory)

  5. Block Structure for PL/SQL Subprograms Header IS|AS Declaration section BEGIN Executable section EXCEPTION (optional) Exception section END;

  6. Benefits of Subprograms • Improved maintenance • Improved data security and integrity • Improved performance

  7. Development Environments • SQL*Plus uses the PL/SQL engine in the Oracle Server • Procedure Builder uses the PL/SQL engine in the client tool or in the Oracle Server

  8. Developing Procedures and Functions Using SQL*Plus

  9. Developing Procedures and Functions Using Oracle Procedure Builder

  10. Summary In this lesson, you should have learned that: • Anonymous blocks are unnamed PL/SQL blocks • Subprograms are named PL/SQL blocks, declared as either procedures or functions • There are two main PL/SQL development environments: • SQL*Plus • Procedure Builder

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