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Message Posted: Sun, 08 Aug 2004 @ 10:42:07 GMT
Recently I faced question like
1) How to make out whether optimizer has used a join index if it exists, using the Explain outputs or whether it uses a secondary index or primary index, or hash index?
2) can we guarantee the use of a index for a particular type of sql?
3) What happens if a mload script happens to load duplicate row in the target table? And how can we come out of such situations
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