存储过程中将查询语句结果赋值给变量

create  procedure procname
AS
declare @recount int
select @recount=count(id) from school

--最关键在这句
select @recount=count(id) from school
select @recount=select count(id) from school -- 错误:这里就不再需要select了

set @recount=count(id) from school -- 错误这里只能用select不能用set


 如果school为一个@chart参数的话，上面方法就不适用了
应该为:

declare @getRecordSql nvarchar(100)
set @getRecordSql='select @recordcount=count(1) from '+@chart
exec sp_executesql @getRecordSql,N'@recordCount int output',@recordCount output

N'@recordCount int output',@recordCount output
做一个参数的替换,如果测试一下:print @recordCount的话就会显示行数


 //示例:选择最新的5条数据从20条开始

execute A_School_getNew 5,20

--存储过程

create procedure A_School_getNew
 @Size int,
 @StartIndex int
AS
declare @recount int
declare @Sql nvarchar(120)
select @recount=count(id) from school
set @Sql='select top '+convert(nvarchar,@Size)+'id,school_name from school where('+
 'ID not in(select top '+convert(nvarchar,@recount-@startIndex+@size)+
 ' id from school)) order by id desc';
execute (@Sql)