分页存储过程

CREATE PROCEDURE PageCut2
@tblName varchar(255), -- 表名
@strGetFields varchar(1000) = '*', -- 需要返回的列
@fldName varchar(255)='', -- 排序的字段名
@PageSize int = 10, -- 页尺寸
@PageIndex int = 1, -- 页码
@OrderType bit = 0, -- 设置排序类型, 非 0 值则降序
@strWhere varchar(1500) = '' ,-- 查询条件 (注意: 不要加 where)
@Counts   int   out -- 返回记录总数, 非 0 值则返回 这里作运行后返回的记录总数分页用
AS
set nocount on
declare @strSQL varchar(5000) -- 主语句
declare @CountSQL nVarchar(4000)
declare @strTmp varchar(110) -- 临时变量
declare @strOrder varchar(400) -- 排序类型

if @OrderType != 0
begin
set @strTmp = '<(select min'
set @strOrder = ' order by [' + @fldName +'] desc'
--如果@OrderType不是0，就执行降序，这句很重要！
end
else
begin
set @strTmp = '>(select max'
set @strOrder = ' order by [' + @fldName +'] asc'
end

if @PageIndex = 1
begin
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) +@strGetFields+ ' from [' + @tblName + '] where ' + @strWhere + ' ' + @strOrder

else
set @strSQL = 'select top ' + str(@PageSize) +@strGetFields+ ' from ['+ @tblName + '] '+ @strOrder
--如果是第一页就执行以上代码，这样会加快执行速度
end

else
begin
--以下代码赋予了@strSQL以真正执行的SQL代码
set @strSQL = 'select top ' + str(@PageSize) +@strGetFields+ ' from [' + @tblName + '] where [' + @fldName + ']' + @strTmp + '(['+ @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['+ @fldName + '] from [' + @tblName + ']' + @strOrder + ') as tblTmp)'+ @strOrder
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from [' + @tblName + '] where [' + @fldName + ']' + @strTmp + '([' + @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' [' + @fldName + '] from [' + @tblName + '] where ' + @strWhere + @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder
end

if @strWhere != ''
set @CountSQL='select   @Counts=count(*) from   [' + @tblName + '] where ' + @strWhere +''
else
set @CountSQL='select   @Counts=count(*) from   [' + @tblName + '] '

exec sp_executesql @CountSQL, N'@Counts int out ',@Counts out
exec ( @strSQL)
set nocount off
GO