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Hrm, SQL query help. by abaron2007-05-09 13:38:44
  One quick shot at it. by CynicalRyan2007-05-09 13:44:15
    actually... by ricochetv12007-05-09 13:50:35
      NOT IN () is BAD!!!!!! by merlin 2007-05-09 13:51:40
It generates a sub-select against table2 for EVERY ROW returned in table1, then performs the comparison.

If you use the outer join syntax, your query performance will increase dramatically.
[ Reply ]
        I guess... by ricochetv12007-05-09 13:57:45
          Yes, true, but in general outer joins outperform by merlin2007-05-09 13:59:37
            IN() is quite useful in some circustances though, by Scirocco2007-05-09 14:04:27
              Excellent point. Let me rephrase: by merlin2007-05-09 14:06:31
                It's actually a case of mis-optimitization. by staticsan2007-05-09 16:09:11
          JOINs are pretty basic SQL, IMO (n/t) by CynicalRyan2007-05-09 14:00:14
            Yes, but they can get complex very quickly. by merlin2007-05-09 14:03:17
              Tell me about it.. by CynicalRyan2007-05-09 14:04:00

 

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