SQLServer 高效 分页存储过程
/**********************************************************************
参数：@PrimaryKey 主键，@OrderBy 排序字段,@SqlStr sql语句,@PageSize 每页显示的记录,@PageIndex 当前页(从0开始)
***********************************************************************/
ALTER procedure [dbo].[PageQuery]
@PrimaryKey varchar(100),--主键
@OrderBy varchar(100),--排序字段
@SqlStr varchar(8000),--sql语句
@PageSize int,--每页显示的记录
@PageIndex int--当前页(从1开始)
--@RecordCount int output --返回的总记录数
as
declare @ExecSql varchar(8000)--要执行的Sql组合
if @OrderBy=''
set @OrderBy='order by '+@PrimaryKey+' asc'
else if (len(@OrderBy)<8 or upper(substring(@OrderBy,1,8))<>'ORDER BY')
set @OrderBy='order by '+@OrderBy
if @PageSize=-1--用于ajax的第一次查询
set @PageSize=0
set @PageIndex=@PageIndex-1
print('-----'+CAST(@PageIndex as varchar(10)) )
begin
declare @recordCount int,@pageCount int
declare @s nvarchar(4000)
set @s = N'select @recordCount = count('+@PrimaryKey+') from ('+@SqlStr+') TN'
exec sp_executeSql @s,N'@recordCount int output',@recordCount output
if(@pageSize>0)
set @pageCount = (@recordCount - 1 + @PageSize) / @PageSize;--总页数
else
set @pageCount = 0;--总页数
if @PageIndex<=0--如果是第一页就执行这个
begin
set @ExecSql='select top '+cast(@PageSize as varchar(100))+' * from ('+@SqlStr+') T '+@OrderBy
end
else
begin
if charindex('2000 - 8.00.',@@version)>0
begin
set @ExecSql=
'select top '+cast(@PageSize as varchar(100))+' *
from ('+@SqlStr+') as T where T.'+@PrimaryKey+' not in
(select top '+cast((@PageSize*@PageIndex) as varchar(100))+' '+@PrimaryKey+'
from ('+@SqlStr+') T2 '+@OrderBy+') '+ @OrderBy
end
else
begin
set @ExecSql=
'select * from
(
select * from
(SELECT *, #RowNum#=ROW_NUMBER() OVER('+@OrderBy+') FROM ('+@SqlStr+') T1) T2 where T2.#RowNum#>='+cast(@PageSize*@PageIndex+1 as varchar(10))+' and T2.#RowNum#<='+cast(@PageSize*(@PageIndex+1) as varchar(10))+'
) T3
'
end
end
exec (@ExecSql+' select '+@recordCount+' as RecordCount,'+@pageCount+' as PageCount ')
end
