SqlServer_存储过程

1.查询全部数据

create proc stu1
as
begin
    select * from Students
end

go

exec stu1

2.根据姓名查询信息

--存储过程内部自带值
create proc stu2
    @StuName varchar() ='flt'   --字符串长度(50)必须要有
as
begin
    select * from Students where StuName=@StuName
end
go

exec stu2

--调用存储过程时传参
alter proc stu2
    @StuName varchar() --字符串长度()必须有
as
begin
    select * from Students where StuName=@StuName
end
go

exec stu2 'flt'

3.带output的存储过程

create proc stu3
    @StuName varchar(), --字符串长度()必须有
    @result varchar() output --输出参数
as
begin
    if(select count(*) from Students where StuName=@StuName)>
        set @result='存在用户'+@StuName
    else
        set @result='不存在用户'+@StuName
end
go

declare @result varchar()
exec stu3 'flt',@result output
print @result

4.存储过程内部设定局部变量用户名来查询用户信息

--存储过程内部设定局部变量用户名来查询用户信息
create proc stu4
as
declare
    @StuName varchar()='flt' --字符串长度()必须有
    --@result varchar() output --输出参数
begin
    select * from Students where StuName=@StuName
end
go

exec stu4 

5.根据用户名查询城市

--根据用户名查询城市
create proc stu5
    @StuName varchar() --字符串长度()必须有
as
declare
    @City varchar()
begin
    set @City=(select City from Students where StuName=@StuName)
    select @City
end
go

exec stu5 'flt'

6.存储过程插入用户信息

--存储过程插入用户信息
create proc stu6
     @ID int,
     @StuName varchar(),
     @Phone varchar(),
     @Address varchar(),
     @City varchar()
as
begin
    insert into Students(ID,StuName,Phone,Address,City)
        values (@ID,@StuName,@Phone,@Address,@City)
end
go

exec stu6 ,'kxy','','汕头','汕头'

7.删除

create proc stu7
    @StuName varchar()
as
begin
    delete from Students where StuName=@StuName
    return @@rowcount
end
go

declare @result int
exec @result=stu7 'kxy'
select @result as 删除条数

8..NET EF框架执行存储过程语句

　　List<Student> stu= stuen.Students.SqlQuery("exec stu1").ToList();