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An Object-Oriented Multimedia Database System for a News-on-Demand Application*

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The ANSI standard Structured Query Language (SQL) provides basic functions for data manipulation, transaction control, and record retrieval from the database. How- ever, most end users interact with Oracle through applications that provide an inter- face that hides the underlying SQL and its complexity. PL/SQL Oracle’s PL/SQL, a procedural language extension to SQL, is commonly used to implement program logic modules for applications. PL/SQL can be used to build stored procedures and triggers, looping controls, conditional statements, and error handling. You can compile and store PL/SQL procedures in the database. You can also execute PL/SQL blocks via SQL*Plus, an interactive tool provided with all ver- sions of Oracle. Oracle Database.