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    What do you want to replace and why? Commented Dec 7, 2012 at 9:08
  • To use a built-in function if any exists and be shorter. Commented Dec 7, 2012 at 9:15
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    Your original SQL is short and clear. I see no reason to replace it unless you run into performance problems. In case you do, you should look at Jack Douglas answer, which may be able to utilize an index. Commented Dec 7, 2012 at 9:46