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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
  •        Used for creating, managing, manipulating and querying the database objects such as tables, views etc. 
       
            SQL is divided into the following

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

DML -- insert, update, delete
DRL -- select
DCL -- grant, revoke


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