sql 语句

select * from student inner/left/right/full join grade on student.no = grade.no 

 

 

CREATE VIEW Student（Sno，Sname，Ssex，Sage，Sdept）
AS
SELECT SX.Sno，SX.Sname，SY.Ssex，SX.Sage，SY.Sdept
FROM SX，SY
WHERE SX.Sno=SY.Sno；