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Monday, 28 March 2016

SQL Introduction

SQL stands for Structured Query Language
SQL statements are used to retrieve and update data in a database
Is a Non-procedural query language

        SQL is divided into the following

                          Data Definition Language (DDL)
                          Data Manipulation Language (DML)

DDL -- create, alter, drop, truncate, rename
DML -- insert, update, delete
DRL -- select
TCL -- commit, rollback, savepoint
DCL -- grant, revoke


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