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It’s literally the documented idiom for producing singular output from amplified rows at https://www.postgresql.org/docs/current/functions-subquery.html#FUNCTIO
by inopinatus 3y ago
It’s literally the documented idiom for producing singular output from amplified rows at https://www.postgresql.org/docs/current/functions-subquery.html#FUNCTIONS-SUBQUERY-EXISTS https://www.postgresql.org/docs/current/functions-subquery.h....