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Procedural Language/SQL (PL/SQL) is Oracle Corporation’s procedural language extension to SQL, the standard data access language for relational databases. PL/SQL offers modern software engineering features such as data encapsulation, exception handling, information hiding, object orientation, and brings state-of-the-art programming to the Oracle Server and toolset.
PL/SQL incorporates many of the advanced features of programming languages that were designed during the 1970s and 1980s. It allows the data manipulation and query statements of SQL to be included in block-structured and procedural units of code, making PL/SQL a powerful transaction processing language. With PL/SQL, you can use SQL statements to finesse Oracle data, and PL/SQL control statements to process the data.