How do I check if there are any NULLs in an entire table (across all columns) in T-SQL

Question

I'm wondering if I can run an ad-hoc query just to see if a table contains any NULL values across any of its columns. The table has 100+ columns so doing this manually would be a huge pain.

Answer 1

You can try like this:

DECLARE @tb NVARCHAR(255) = N'dbo.[table]';

DECLARE @sql NVARCHAR(MAX) = N'SELECT * FROM ' + @tb
    + ' WHERE 1 = 0';

SELECT @sql += N' OR ' + QUOTENAME(name) + ' IS NULL'
    FROM sys.columns 
    WHERE [object_id] = OBJECT_ID(@tb);

EXEC sp_executesql @sql;

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