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Home/ Questions/Q 122095
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Asked: May 11, 20262026-05-11T04:04:28+00:00 2026-05-11T04:04:28+00:00

How to Set a existing column of MS SQL table as NOT NULL?

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How to Set a existing column of MS SQL table as NOT NULL?

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  1. 2026-05-11T04:04:29+00:00Added an answer on May 11, 2026 at 4:04 am
    ALTER TABLE tablename ALTER COLUMN columnname datatype NOT NULL 

    You will obviously have to make sure that the column does not contain any NULL values before doing this.

    E.g.

    ALTER TABLE orders ALTER COLUMN customer_id INT NOT NULL 
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