sql server - What steps should be necessary to optimize a poorly performing query? -

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i know broad question, i've inherited several poor performers , need optimize them badly. wondering common steps involved optimize. so, steps of guys take when faced same situation?

related question:
what generic techniques can applied optimize sql queries?

  1. look @ execution plan in query analyzer
  2. see step costs most
  3. optimize step!
  4. return step 1 [thx vinko]

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