What is PL/SQL?

PL/SQL (Procedural Language for SQL) is a procedural language developed by Oracle to work with Oracle database using procedures in SQL. PL/SQL program units are compiled by the Oracle Database server and stored inside the database. And at run-time, both PL/SQL and SQL run within the same server process, bringing optimal efficiency. PL/SQL automatically inherits the robustness, security, and portability of the Oracle Database. PL/SQL syntaxes includes declarations for variables, constants, procedures, functions, conditions and loops.