SQL分页存储过程

create proc PagingForAll
@TableName nvarchar(50), ---表
@Columns nvarchar(500), ---查询的列
@Where nvarchar(500)='', ---查询条件
@IdentityColumn nvarchar(50), ---列，增长列，一般为主键
@OrderBy nvarchar(50)='', --通过哪列排序
@PageIndex int, ----第N页
@PageSize int =50 ----每页多少行
as
set nocount on
declare @sql nvarchar(1000)
if len(@OrderBy)=0
set @OrderBy =@IdentityColumn
set @sql='select top '+convert(nvarchar(10), @PageSize)+' '+@Columns+' from '+@TableName+' where 1=1 '+@Where+' and '+@IdentityColumn+'>
( select isnull(max('+@IdentityColumn+'),0) from
( select top '+convert(nvarchar(10), @PageSize*(@PageIndex-1))+' '+@IdentityColumn+' from ['+@TableName+']
where 1=1 '+@Where+' order by '+@OrderBy+' ) t
)
'
exec(@sql)
set nocount off
go