NULL Data in table - MYSQL Commands - Codemiles

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DrRakha

DrRakha
Posts: 2715
Joined: Tue Mar 27, 2007 10:55 pm
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NULL Data in table

Mon Jul 16, 2012 1:11 pm

For not defined value or missing value you can use IS NULL condition to add some constrains on your select query.

Code:: SELECT * FROM 'Department' WHERE name IS NULL

or

Code:: DELETE FROM 'Department' WHERE name IS NULL

You can also use IS NOT :

Code:: SELECT * FROM 'Department' WHERE name IS NOT NULL

You also update column data value to NULL

Code:: update 'Department' set name = null

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