Question

I create a field ‘RankID’ with Int(8) (from PHPMyadmin Web GUI Structure page, I can found the column of NULL value is No; and the column of Default value is None )type in my table.
I found some of the Int default value was ‘0’. Actually, I don’t want any ‘0’ value in my table for ‘RankID’. It will cause the sort action list RankID ‘0’ at the top row of my result table.

How can I fix this issue?

Can I correct the field with Int(8) (NULL -> Yes; Default -> NULL)?

If I can correct my Int(8) as above. Then how can I update hundreds of record RankID value from ‘0’ to ‘null’?

Any comments, suggestions are appreciated.

Answer 1

You created the column as being NOT NULL. The database eninge is behaving as it should.

Updating the existing fields from 0 to NULL is done with following update statement.

UPDATE Table
SET    RankID = NULL
WHERE  RankID = 0