存储过程实例大全

存储过程几个实例
1.选择表中所有内容并返回一个数据集

CREATE PROCEDURE mysp_All
AS
select * from AjaxCity
GO

2.根据传入的参数进行查询并返回一个数据集

CREATE PROCEDURE mysp_para
@CityName varchar(255),

@Short varchar(255)
AS
select * from AjaxCity where CityName=@CityName And Short=@Short
GO

3.带有输出参数的存储过程(返回前两条记录的ID的和)

CREATE PROCEDURE mysp_output
@SUM int output
AS
select @SUM=sum([ID]) from (select top 2 * from AjaxCity) as tmpTable
GO

4.在存储过程中使用游标

CREATE PROCEDURE mysp_Cursor
@Result varchar(255) output//声明输出变量
AS
declare city_cursor cursor for//声明游标变量
select [ID] from AjaxCity

set @Result=''
declare @Field int//声明临时存放CityID的变量
open city_cursor //打开游标
fetch next from city_cursor into @Field//将实际ID赋给变量
while(@@fetch_status=0)//循环开始
begin
if @Result = ''
select @Result = convert(nvarchar(2),count(*)) from AjaxCounty where CityID=@Field
else
select @Result = @Result + ',' + convert(nvarchar(2),count(*)) from AjaxCounty where CityID=@Field

fetch next from city_cursor into @Field//下一个CityID
end
close city_cursor//关闭游标
deallocate city_cursor//释放游标引用
GO