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Page Index

DBMS Introduction

What is DBMS ?
Types of Database
What is RDBMS ?
DBMS vs RDBMS
DBMS vs File System
DBMS Architecture
RDBMS 12 Codd's Rule

MySQL Database

MySQL features
MySQL Create Database
MySQL Select Database
MySQL Show Databases
MySQL Drop Database

MySQL Tables

MySQL CREATE Table
MySQL ALTER table
MySQL Select Show Tables
MySQL Rename Table
MySQL Drop Tables

MySQL Queries

MySQL Constraints
MySQL INSERT Record
MySQL UPDATE Record
MySQL DELETE Record
MySQL SELECT Record

MySQL Clauses

MySQL WHERE
MySQL DISTINCT
MySQL FROM
MySQL ORDER BY
MySQL GROUP BY
MySQL HAVING

MySQL Conditions

MySQL AND
MySQL OR
MySQL LIKE
MySQL IN
MySQL ANY
MySQL EXISTS
MySQL NOT
MySQL NOT Equal
MySQL IS NULL
MySQL IS NOT NULL
MySQL BETWEEN

MySQL Keys

MySQL Unique Key
MySQL Primary Key
MySQL Foreign Key
MySQL Composite Key

MySQL Alter table

MySQL ALTER statement is used when you want to change the name of your table or any table field. It is also used to add or delete an existing column in a table. The ALTER statement is always used with "ADD", "DROP" and "MODIFY" commands according to the situation.

1) ADD a column in the table

Syntax:

   ALTER TABLE table_name 
    ADD new_column_name column_definition  
    [ FIRST | AFTER column_name ];

The MODIFY command is used to change the column definition of the table.

The drop command is used to delete a column from the table.

Let's move on to show table command in MySQL

MySQL Create Table

MySQL Select Show table

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