Re: select * from nmensagem m, nusuario...
| From: | Richard Lynch | Date: | Fri, 16 Mar 2001 07:16:59 +0000 |
| Subject: | Re: select * from nmensagem m, nusuario... | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-44232@lists.php.net to get a copy of this message | ||
> select * from nmensagem m, nusuario u, nprefuser p where
> m.cdpreferencia=p.cdpreferencia and p.flag=1;
>
> With "m.cdpreferencia=p.cdpreferencia" I should get just the values there
> exists on m.preferencia and p.cdpreferencia?
No, because you have a record for every single nusario, since you don't
restrict any relation between u and m, nor u and p
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