Posted by heyvinay on 10/01/53 11:41

Thanks.
Well the application we are designing is for Premium calcuation. The
transaction table will store all the premium calcuation breakdowns.
The reference to table 1 - 4 are various elements within the system
that will generated chargeable premiums. Eg. the product selected;
discounts applied to the customer; specific endorsements; Payment
menthod discounts etc. Once policy is live, and changes to the source
tables (eg product, discount amount) etc or even the cancellation of
the policy will raise NEW records in the transaction tables.

We can manage all this from code directly to ensure all is in sync, but
I prefer to apply referential integrity managed by the DBMS.

You wrote: "For that to work, the Transaction table need to have one FK
column per referencing table. " - does MS SQL allow null values for
foreign key constraints?

Thanks

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