A.SELECT * FROM st_info WHERE st_name LIKE ´王%´ B.SELECT * FROM st_info WHERE st_name LIKE ´王_´ C.SELECT * FROM st_info WHERE st_name=´王%´ D.SELECT * FROM st_info WHERE st_name=´王__´
A.JOIN B.UNION C.INTO D.LIKE
A.COUNT等 B.GETDATE C.YEAR D.DATEADD