Nested Queries? -> Set Value = (Select Value From OtherTable WHERE)
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02-10-2019 - |
Question
I'm looking to do a single query to update a database. Here is some pseudocode:
UPDATE Table1 SET Table1.Value = (SELECT Value FROM Table2 WHERE Table2.Id==2) WHERE Table1.Id == 4
Solution
This will only work if your subquery (SELECT Value FROM Table2 WHERE Table2.Id=2)
only returns one value. Also replace the ==
with =
in your subquery as I have.
I believe updating it to what I have below would make it work no matter what:
(SELECT Top (1) Value FROM Table2 WHERE Table2.Id=2)
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