Hi,
why column "acoltest" is not found by the subselect in this select:
SELECT
acol + 100 as acoltest,
(select max(t) from mytab where anothercol=acoltest) as col2
FROM mytab2
group by somet
???
Only columns belonging to a table can be used in a subselect??? What about "calculated" columns?
Thank you
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