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Home/ Questions/Q 839345
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Editorial Team
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Editorial Team
Asked: May 15, 20262026-05-15T05:26:59+00:00 2026-05-15T05:26:59+00:00

A show create table command shows the following: ‘columnA’ varchar(6) NOT NULL DEFAULT ”;

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A show create table command shows the following:

'columnA' varchar(6) NOT NULL DEFAULT '';

How do I modify that column so that the not null is removed?
I need it to be:

'columnA' varchar(6) DEFAULT NULL;

I thought the following would work, but it has no effect:

ALTER TABLE tbl_name MODIFY columnA varchar(6) DEFAULT NULL;
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  1. Editorial Team
    Editorial Team
    2026-05-15T05:27:00+00:00Added an answer on May 15, 2026 at 5:27 am

    Try this instead:

    ALTER TABLE tbl_name MODIFY columnA varchar(6) NULL DEFAULT NULL; 
    
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