MS SQL Update one row from many rows
Run the attached script.
Why is field val_1 in #table1 = 100.00? I'm expecting 600.00. Any suggestions? Thanks
Why is field val_1 in #table1 = 100.00? I'm expecting 600.00. Any suggestions? Thanks
CREATE TABLE [dbo].[#table1](
[_key] [int],
[val_1] [money])
CREATE TABLE [dbo].[#table2](
[_key] [int],
[val_2] [money])
INSERT INTO #table1 VALUES (1,0)
INSERT INTO #table2 VALUES (1,100.00)
INSERT INTO #table2 VALUES (1,200.00)
INSERT INTO #table2 VALUES (1,300.00)
UPDATE #table1
SET val_1 = IsNull(val_1,0) + IsNull(val_2,0)
FROM #table2
WHERE #table2._key = #table1._key
SELECT * FROM #table1
DROP TABLE #table1
DROP TABLE #table2
SOLUTION
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