AR
Size: a a a
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--month|income|
-------+------+
-- 1| 50|
-- 2| 70|
-- 3| 100|
-- 4| 60|
-- 5| 70|
-- 6| 200|
-- 7| 150|
-- 8| 160|
select
"month",
count("income")
from test
GROUP BY "income"
ERROR: column "test.month" must appear in the GROUP BY clause or be used in an aggregate function
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