Buna !

Cum as putea crea un camp de tip logic (boolean) direct intr-o interogare SQL ?

In Visual Fox faceam ceva de genu:
SELECT .F. as selectat, numar FROM documente


Am incercat in SQL urmatoarele:

SELECT 0 as selectat, numar FROM documente
sau
SELECT 1=0 as selectat, numar FROM documente

dar nu a mers