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13

answers:

1
+1  Q: 

How to know which index used by the SELECT in MySQL?

The table has many different indexes, and some indexes share one field. I want to know which index used in a select query.

+2  A: 

No problem. Just issue your SELECT with EXPLAIN prepended. Like this:

explain select field1, field2 from table1
shylent  2009-10-22 11:47:15

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