Cummings, Shawn (GNAPs) wrote:
If I have 4 Fields (FIELD1, FIELD2, FIELD3 & FIELD4)....
I can do this easily;
UPDATE TABLE_NAME SET FIELD4 = FIELD1;
But -- how do I do it so that FIELD4 = FIELD1 & FIELD2 ??? I can't
seem to find any examples online. Maybe it's just too early in the
morning - I'm drawing a blank! ;)
This depends on the data types, if you want to set FIELD4 to be FIELD1 +
FIELD2 with integers:
UPDATE table_name SET FIELD4 = (FIELD1 + FIELD2);
If they are strings:
UPDATE table_name SET FIELD4 = CONCAT(FIELD1,' ',FIELD2);
If you are swapping values:
UPDATE table_name SET FIELD4 = (@tmp:=FIELD4), FIELD4 = FIELD1, FIELD1 =
@tmp;
Best regards
Mark
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Mark Leith, Support Engineer
MySQL AB, Worcester, England, www.mysql.com
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