SQLServer存储过程

--无参数存储过程创建和调用
--创建存储过程usp_test
user
go
if exists(select * from sysobjects where name=‘usp_test‘)
drop proc usp_test
go
create proc usp_test
as
select * from test
go

--执行存储过程
exec usp_test
go

--有参存储过程创建和调用
--创建存储过程
user test
if exists (select * from sysobjects where name=‘usp_test‘)
drop proc usp_test
go
create proc usp_test
@name varchar(32),
@age int = null
as 
if @age is null
begin
 select * from test where name = @name
end
else 
begin
 select * from test where name = @name and age = @age
end
go

--调用存储过程
exec usp_test @name=‘username‘
go
    

--有参数、输出存储过程和调用
--统计某年龄的人数
--创建存储过程
use test
if exists (select * from sysobjects where name=‘usp_test‘)
drop proc usp_test
go
create proc usp_test
@age varchar(32),
@count int output
as 
set @count = (select count(1) from test where age = @age)
go

--执行存储过程
declare @age varchar(32)
declare @count int 
set @age = ‘26‘
exec usp_test @age ,@count output
print @count
go