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Asked: May 10, 20262026-05-10T23:00:43+00:00 2026-05-10T23:00:43+00:00

I am modifying a SQL table through C# code and I need to drop

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I am modifying a SQL table through C# code and I need to drop a NOT NULL constraint if it exists. How do I check to see if it exists first?

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  1. 2026-05-10T23:00:43+00:00Added an answer on May 10, 2026 at 11:00 pm
    select is_nullable  from   sys.columns where  object_id = OBJECT_ID('tablename')   and    name = 'columnname'; 
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