I've got a problem I've never run into before. In the application I've
recently inherited they've defined a constraint between two columns.
However, in the table that references the primary key the column can
actually contain a null value. 

The problem I'm running into is if I try to insert the data w/a null value I
get a constraint issue, if I leave the column out completely then no
constraint issue is passed.

Example:
insert into
        [user]
( name, departmentId )
        values
( 'dan', null)

That throws an error, while this won't:

insert into
        [user]
( name )
        values
( 'dan' )

The problem is I'm trying to do some operations in bulk so sometimes the
departmentId will be there and sometimes it won't. 

Is there a way around this?

Thanks,
Dan



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