Difference Between SQL and PL/SQL

SQL, Structured Query Language, is a standard database language used to create, maintain and retrieve relational databases, and PL/SQL, the procedural language of SQL Extensions, which extend SQL and provide procedural capabilities.

The following are the important differences between SQL and PL/SQL.

Serial number	Keywords	SQL	PL/SQL
1	Definition	SQL is a structured query language for databases.	PL/SQL is a programming language that uses SQL.
2	Variables	SQL has no variables.	PL/SQL has variables, data types, etc.
3	Control structure	SQL does not have FOR loops, if controls, and similar structures.	PL/SQL has FOR loops, while loops, if controls and other similar structures.
4	Operation	SQL can only perform one operation at a time.	PL/SQL can perform multiple operations at the same time.
5	Language type	SQL is a declarative language.	PL/SQL is a procedural language.
6	Embedding	SQL can be embedded in PL/SQL blocks.	PL/SQL can also be embedded in SQL code.
6	Interaction	SQL interacts directly with the database server.	PL/SQL does not interact directly with the database server.
7	Positioning	SQL is a data-oriented language.	PL/SQL is an application-oriented language.
8	Objective	SQL is used to write queries, create and execute DDL and DML statements.	PL/SQL is used to write program blocks, functions, procedures, triggers and packages.

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