| Update [message #371549] |
Mon, 06 November 2000 10:46  |
Ronh
Messages: 1
Registered: November 2000
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Junior Member |
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I'm trying to update 1 table with info from another table. The column to update must only be updated where value in another column is equal in both tables.
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| Re: Update [message #371555 is a reply to message #371549] |
Tue, 07 November 2000 04:14  |
John R
Messages: 156
Registered: March 2000
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Senior Member |
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I think the SQL you are looking for is either:
UPDATE table_1
SET column_1 = (SELECT nvl(max(table_2.column_1)
,table_1.column_1)
FROM table_2
WHERE table_2.column_2 = table_1.column_2)
Or you can use
UPDATE table_1
SET column_1 = (SELECT column_1
FROM table_2
WHERE table_2.column_2 = table_1.column_2)
WHERE EXISTS (SELECT 1
FROM table_2
WHERE table_2.column_2 = table_1.column_2
Hope this heplps
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