Oracle

PL/SQL

PL/SQL stands for “Procedural Language extensions to the Structured Query Language”. 
SQL is a popular language for both querying and updating data in the relational database management systems (RDBMS). 
PL/SQL adds many procedural constructs to SQL language to overcome some limitations of SQL. 
Besides, PL/SQL provides a more comprehensive programming language solution for building mission-critical applications on Oracle Databases.

What is PL/SQL

PL/SQL is an embedded language. PL/SQL only can execute in an Oracle Database.

- Oracle Forms

PL/SQL ENGINE
Procedural Statment Executor

SQL ENGINE
SQL Statement Executor

PL/SQL - Arrays