Problem while data push on not null columns?

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i have composite keys in my table ( group of primary keys) & assigned not null to them,
but the problem is coming while data pushing, one column having null value but he is giving me error :

Cannot insert the value NULL into column 'DEPARTMENT_ID', table 'dbo.ACCOUNT'; column does not allow nulls. UPDATE fails.
The statement has been terminated.

...how to push data of null values

What I have tried:

i tried to push data but due to primary key, he is not accepting null value

Posted 13-Nov-17 22:17pm

Member 12224208

Updated 13-Nov-17 22:28pm

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OriginalGriff · Answer 1 · 2017-11-13T22:28:00

If the column does not allow nulls - and a Primary Key column can't because values must be unique - then you cannot insert a null value; that is what the error message is saying.

The same thing applies to composite primary keys: they cannot contain null values either, because all parts are compared and NULL does not compare to NULL:

SELECT CASE WHEN NULL = NULL THEN 'YES' ELSE 'NO' END

Will always give you the result "NO".

You cannot use a NULL value in any part of a composite primary key.