分页存储过程

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前几天写,分页存储过程!
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-- Function: Select a record from table SearchKey
-- Date Created: 2007年7月14日
-- Created By:    sjf
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-- 获取指定页的数据
CREATE PROCEDURE spPagination
@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
@doCount bit = 0, -- 返回记录总数, 非 0 值则返回
@OrderType bit = 0, -- 设置排序类型, 非 0 值则降序
@tblPk varchar(100),--表的主键字段(可省略)
@MainTable varchar(100),--主要操作表格(可省略)
@strWhere varchar(1500) = ''-- 查询条件 (注意: 不要加 where)

AS
declare @strSQL varchar(5000) -- 主语句
declare @strTmp varchar(110) -- 临时变量
declare @strOrder varchar(400) -- 排序类型
if @doCount != 0
begin
       if @strWhere !=''
         set @strSQL = "select count(*) as Total from " + @tblName + " where "
       else
         set @strSQL = "select count(*) as Total from " + @tblName + ""
end
--以上代码的意思是如果@doCount传递过来的不是0，就执行总数统计。以下的所有代码都是@doCount为0的情况
else
begin
      if @OrderType != 0
        begin
          set @strTmp = "<(select min"
          set @strOrder = " order by " + @fldName +" desc,"+ @tblPk
          --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,"+ @tblPk
        end
       if @PageIndex = 1
         begin
           if @strWhere != ''
            set @strSQL = "select top " + str(@PageSize) +" "+ " from " + @tblName + " where " + @strWhere + " " + @strOrder
           else
            set @strSQL = "select top " + str(@PageSize) +" "+ " 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
           if @strWhere != ''
    begin
      set @strSQL="select top "+str(@PageSize*@PageIndex)+" newid = cast("+" AS int),tempid = IDENTITY (int, 1, 1) INTO #temptable1 FROM "+ @tblName + " where "+ @strWhere+ " " + @strOrder +";"
      +"select top "+str(@PageSize)+" "+" from "+" where " +"   in(SELECT newid FROM [#temptable1] WHERE (tempid >"+str(@PageSize*(@PageIndex-1))+")) "
    end
           else
     set @strSQL="select top "+str(@PageSize*@PageIndex)+" newid = cast("+" AS int),tempid = IDENTITY (int, 1, 1) INTO #temptable1 FROM "+ @tblName+ " " + @strOrder +";"
     +"select top "+str(@PageSize)+" "+" from "+" where " +"   in(SELECT newid FROM [#temptable1] WHERE (tempid >"+str(@PageSize*(@PageIndex-1))+")) "
    end
end
--print @strSQL
exec (@strSQL)
GO

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