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From:Egor Egorov Date:July 26 2002 9:19am
Subject:Re: Accessing multiple indexes
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Orr,
Friday, July 26, 2002, 12:13:17 AM, you wrote:

O> It's my understanding that MySQL will only use one index per table on a
O> given query. For example...

O> SELECT * FROM <HUGE_TABLE>
O> WHERE <col1> = <val1>
O> AND <col2> < <val2>
O> AND <col3> > <val3> ;

O> If col1, col2, and col3 are indexed the query can only use one index, right?


O> Single index access is a problem when you very large tables. What if you
O> have a query with a result set of just 10 rows but there are no indexed
O> columns that can limit the result set to < 1 million rows? I really need to
O> be able to use multiple indexes in a single table query and I don't want to
O> have to perform self joins or create temp tables.

Create index on several columns:
       http://www.mysql.com/doc/M/u/Multiple-column_indexes.html





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Thread
Accessing multiple indexesSteve Orr25 Jul
  • Re: Accessing multiple indexesDan Nelson26 Jul
  • Re: Accessing multiple indexesEgor Egorov26 Jul
RE: Accessing multiple indexesAnders Nielsen26 Jul