[SQL] Nested select

[Hubert Retif]

Hi,   I am migrating my application from MySQL to Postgresql and have met following situation:   SELECT (sum(sold_price)/(select sum(sold_price) from car_archive))*100 as CA_pcent, reason_text FROM car_archive group by reason_text order by CA_pcent desc   works perfectly in MySQL, but not in Postgresql. The problem seems to be the nested select which should deliver a sum of the whole table, but it does not.   If I replace this nested select with a fix value, then it works:   SELECT (sum(sold_price)/(333))*100 as CA_pcent, reason_text FROM car_archive group by reason_text order by CA_pcent desc   Has someone a solution for that situation?   Thanks, Hubert Retif