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Duplicate entries on a unique key?

Thread title: Duplicate entries on a unique key?
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06-18-2012, 03:56 PM
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  Old  Duplicate entries on a unique key?

ALTER TABLE  `users votes`,
ADD UNIQUE  `voting key` (  `userid` ,  `forumtopicid`  ,  `replyid`   )

Shouldn't the above prevent duplicate entries of userid, forumtopicid and replyid together?!?

If I seperate "voting key" into two uniques: userid & forumtopicd; userid & replyid. Then it works perfectly but I can't shake the feeling that it could and should be done on 1 unique key.

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07-17-2012, 12:44 PM
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I guess you need to add some type of CONSTRAINT for this to work ?

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