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MYSQL - Can you multiply a field by a value in a single query

egan007 · 2008-02-13 09:24:35

Hi Is it possible to so something like. select field1 field2 from table multiply value by 2 write value back to table. Or would you have to extract all values first do the maths then write back. Thanks

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13-02-2008 10:24am

#1

egan007

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Join Date: January 2003

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Hi Is it possible to so something like.

select field1 field2 from table multiply value by 2 write value back to table.

Or would you have to extract all values first do the maths then write back.

Thanks

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#2 13-02-2008 10:41am
cgarvey

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Posts: 3749
Something like
UPDATE table_name SET field_name = ( field_name * 2 );
?

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#3 13-02-2008 10:49am
egan007

Registered Users Posts: 2,934 ✭✭✭

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Perfect -thanks

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#4 07-04-2009 7:11pm
dmeehan

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Posts: 2296

just what i was looking for

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