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Developers, Are there two tables(jfourm_vote_results, jforum) that doesn't have any primary key? Or Am I searching in a wrong place?

If there are, why?

If there aren't, where are the primary keys?
[originally posted on jforum.net by Guilherme Moreira]
 
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I've made in my way, using EmbeddedId.

Some problem?
[originally posted on jforum.net by Guilherme Moreira]
 
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