CREATE TABLE table_22993 ("Pos" FLOAT, "Member Association" TEXT, "Points  ( total 500 ) " FLOAT, "Clubs" FLOAT, "Group stage" FLOAT, "Play-off" FLOAT, "AFC Cup" FLOAT)

which group stage was there 0 play-offs and 12 clubs played in it
SELECT COUNT("Group stage") FROM table_22993 WHERE "Play-off" = '0' AND "Clubs" = '12'
SELECT COUNT("Group stage") FROM "table_22993" WHERE "Clubs" = '12' AND "Play-off" = '0'