| From: | MargaretGillon(at)chromalloy(dot)com |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Constraint for two fields unique any order |
| Date: | 2006-07-19 16:01:23 |
| Message-ID: | OF69153234.44961C4B-ON882571B0.0056FC62-882571B0.0058013D@CHROMALLOY.COM |
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| Lists: | pgsql-general |
I have a junction table that is recording relationships between two
records in another table. Is there a way that I can create a constraint so
that the values are not repeated in any order? I want to make sure that
rows such as 2 and 4 in the example below cannot happen. This is a very
small table that is meta data for an application. It is only 41 rows now
and probably won't grow beyond 200 rows. I am on Postgresql ver 7.3.4 .
id fkey1 fkey2
1 3 4
2 10 4
3 2 7
4 4 10
5 15 8
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Margaret Gillon, IS Dept., Chromalloy Los Angeles, ext. 297
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