USE studentdb
go

SET NOCOUNT ON 
go
--********** create proc_student_info **********--
--********** Begin **********--
CREATE PROCEDURE proc_student_info
AS
BEGIN
    SELECT * FROM student
END
--********** End **********--
go
exec proc_student_info
go

--********** create proc_sno **********--
--********** Begin **********--
CREATE PROCEDURE proc_sno
    @sno varchar(20)
AS
BEGIN
    SELECT * FROM student WHERE sno = @sno
END
--********** End **********--
go
exec proc_sno '1001'
go

--********** create proc_add **********--
--********** Begin **********--
CREATE PROCEDURE proc_add
    @sno varchar(20),
    @sname varchar(20),
    @sex varchar(10),
    @birthday date,
    @discipline varchar(20),
    @school varchar(20)
AS
BEGIN
    INSERT INTO student(sno, sname, sex, birthday, discipline, school)
    VALUES(@sno, @sname, @sex, @birthday, @discipline, @school)
END
--********** End **********--
go
exec proc_add '1004','HMM','female','2019-6-2','English','national school'
go
exec proc_student_info
go

--********** create student_del **********--
--********** Begin **********--
CREATE PROCEDURE student_del
    @sno varchar(20)
AS
BEGIN
    IF EXISTS (SELECT * FROM student WHERE sno = @sno)
    BEGIN
        DELETE FROM student WHERE sno = @sno
        PRINT 'successfully deleted'
    END
    ELSE
        PRINT 'No such student'
END
--********** End **********--
go
exec student_del '1001'
go
exec proc_student_info
go