“Как считать, кроме как в PSQL” Ответ

Как считать, кроме как в PSQL

# In case you want to count the no. of rows in your psql query which is using except

# let's say this is your original query

SELECT id from table1 except select id from table2;

# to get count do this
select count(*) from (SELECT id from table1 except select id from table2) temp;