A.SELECT * FROM Students WHERE 专业="网络工程 "B.SELECT * FROM Students WHERE 0<>0C.SELECT * FROM Students WHERE "姓名"=李明D.SELECT * FROM Students WHERE 专业="计算机" & "技术"
A.SELECT COUNT(*) FROM Students GROUP BY 性别 DESCB.SELECT COUNT(*) FROM Students GROUP BY 性别C.SELECT * FROM Students ORDER BY 学号 DESCD.SELECT * FROM Students ORDER BY 学号 ASC