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13 changes: 9 additions & 4 deletions solutions/061.sql
Original file line number Diff line number Diff line change
@@ -1,4 +1,9 @@
SELECT
(SELECT SUM(inc) FROM income_o)
-
(SELECT SUM(out) FROM outcome_o)
SELECT sum(i) FROM
(SELECT sum(inc) as i FROM
income_o

UNION

SELECT -sum(out) as i FROM
outcome_o
) as t