Update from select with multiple fields?
I can do the following to in开发者_JS百科sert records into a table from a select on another table:
INSERT INTO table (field1, field2) SELECT field1,field2 FROM table2
Can I do the same with an update ?? Something like this (not working!):
UPDATE table SET field1=table2.field1, field2=table2.field2 SELECT field1,field2 FROM table2
WHERE table.field0=table2.field0
I know how to do this with only 1 field, but is there a way to do it with multiple fields?
UPDATE table A INNER JOIN table2 B USING (field0)
SET A.field1 = B.field1,A.field2 = B.field2;
Yes, like this:
UPDATE table SET
field1=(select field1 from table2 WHERE field0=table1.field0)
field2=(select field2 from table2 WHERE field0=table1.field0)
-- WHERE some condition (optional)
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