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How to create update and delete columns in SQL

One of the three main task you in SQL is creating, updating and deleting columns of tables. This tutorial explains how to create, update and delete co
http://javarevisited.blogspot.com/2012/12/sql-query-to-add-modify-and-drop-column-not-null-constraint-table.html

Description:

One of the three main task you in SQL is creating, updating and deleting columns of tables. This tutorial explains how to create, update and delete column from a table using simple SQL example.

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