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john rob

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Posted on    May-04-2013 2:13 AM

 MSSQL Server MSSQL Server 

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Hi Expert!

I would like a constraint on a SQL Server 2000 table column that is sort of a combination of a foreign key and a check constraint. The value of my column must exist

in the other table, but I am only concerned with values in the other table where one of its columns equal a specified value. The simplified tables are:

part_number  varchar(30)
quantity     int

part_number  varchar(30)
type         char(1)
So I want to ensure the part_number exists in inventory_master, but only if the type is 'C'. Is this possible? Thanks.

Thanks in advance!


Total Post:604

Posted on    May-04-2013 9:06 AM

Hi John!

You could use an INSTEAD OF INSERT trigger to emulate that behaviour.

Check value existence when an insert is about to occur.

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