mysql中where後面的if

mysql中查詢條件中的if。

IF（條件，true執行，false執行）；

SELECT g.id,g.title,g.minbuy,g.total FROM goods g WHERE g.`uniacid` = 2 and g.`merchid`=1 AND g.`status` = 1  and g.`total`>0 and g.`deleted`=0  AND g.`checked`=0 AND IF(g.minbuy=0,g.total<=2,g.total<=2*g.minbuy)  ORDER BY g.`status` DESC, g.`merchdisplayorder` DESC,g.`id` DESC