Question

I have to insert data into a table with the following pattern

INSERT INTO tablename (a, b) VALUES (
    (123, (SELECT foo FROM someothertable WHERE some_condition)),
    (456, (SELECT foo FROM someothertable WHERE some_condition)),
    (789, (SELECT foo FROM someothertable WHERE some_condition)),
    ...

All inserted rows have the same value for the b column and I want to factor it out. I could manually perform the subselect and paste the value in, but that will break encapsulation in the set of scripts I’m writing.

Can I do this in pure SQL within the same query?

Answer 1

INSERT INTO tablename (a, b)
SELECT X.bar, S.foo
FROM someothertable S
   CROSS JOIN
   (SELECT 123 AS bar UNION ALL SELECT 456 UNION ALL SELECT 789) X
WHERE some_condition