>>Hi,
>>
>>I want to create the following foreign key constraint:
>>
>>
>>alter table [dbo].[table1] add constraint [FK_table1_building]
>>foreign key ([building],[site_no])
>>references [dbo].[buildings] ([building],[site_no])
>>on delete set null
>>on update cascade
>>
>>
>>But the above constraint requires that the table Table1 has column SITE_NO (int) as NULL. But I want that the SITE_NO to be NOT NULL. That is, when the entry is deleted from Buildings table I want the column Building in Table1 to be set to NULL but leave the SITE_NO column left without change. Is this possible? Can I modify the ON DELETE part of the above syntax to make it work as I want it? TIA.
>
>That's job for trigger :-)
Thank you, Borislav.
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