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Difference between SQL and PL/SQL
SQL, Structural Query Language is a standard database language which is used create, maintain and retrieve the relational database whereas PL/SQL, Procedural Language extension to SQL, it extends SQL and provide it procedural capabilities.
Following are the important differences between SQL and PL/SQL.
| Sr. No. | Key | SQL | PL/SQL |
|---|---|---|---|
| 1 | Definition | SQL, is Structural Query Language for database. | PL/SQL is a programming language using SQL for a database. |
| 2 | Variables | SQL has no variables. | PL/SQL has variables, data types etc. |
| 3 | Control Structures | SQL has no FOR loop, if control and similar structures. | PL/SQL has FOR loop, while loop, if controls and other similar structures. |
| 4 | Operations | SQL can execute a single operation at a time. | PL/SQL can perform multiple operation at a time. |
| 5 | Language Type | SQL is a declarative language. | PL/SQL is a procedural language. |
| 6 | Embedded | SQL can be embedded in a PL/SQL block. | PL/SQL can also be embedded in SQL code. |
| 6 | Interaction | SQL directly interacts with database server. | PL/SQL does not directly interacts with database server. |
| 7 | Orientation | SQL is data oriented language. | PL/SQL is application oriented language. |
| 8 | Objective | SQL is used to write queries, create and execute DDL and DML statments. | PL/SQL is used to write program blocks, functions, procedures, triggers and packages. |
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