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Re: Foreign Key referencing multiple tables: possible?
Posted by: Samuel Sol Santos
Date: December 01, 2008 07:37AM

Hello Vinod

Thanks for your reply. Although it doesn't actually help me in this case, since the value may be or may not be present in all the tables.

Let me try to explain more what I need to see if you and the others can help me find a better solution.

The system I'm working on, is connected to a lot of different databases. I'm importing these data, treating them, and storing on my INNODB system. This field, (cod_sap mediumint unsigned not null UNIQUE), is a a non-necessary unique key in each of those database, but may be in more than one, or in none, and may appear more than once in 2 of them.

This fourth table will store a series of calculations (20 fields total) based on the values found on the others, grouped by the cod_sap. I wanted to guarantee that someone would be able to store bogus data by creating a row for a cod_sap that is non-existent. Any advice how I could enforce it on the DB side?


Thank you,
Sol

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Re: Foreign Key referencing multiple tables: possible?
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December 01, 2008 07:37AM


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