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实现上千万条数据的分页显示

 2007-11-11 05:55:44 来源:WEB开发网   
核心提示:-- 获取指定页的数据CREATE PROCEDURE GetRecordFromPage @tblName varchar(255), -- 表名 @fldName varchar(255), -- 字段名 @PageSize int = 10, -- 页尺寸 @PageIndex int = 1,

-- 获取指定页的数据
CREATE PROCEDURE GetRecordFromPage
   @tblName    varchar(255),    -- 表名
   @fldName    varchar(255),    -- 字段名
   @PageSize   int = 10,      -- 页尺寸
   @PageIndex   int = 1,       -- 页码
   @IsCount    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
   @strWhere   varchar(1000) = ''  -- 查询条件 (注意: 不要加 where)
AS

declare @strSQL  varchar(6000)    -- 主语句
declare @strTmp  varchar(100)     -- 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"
end
else
begin
   set @strTmp = ">(select max"
   set @strOrder = " order by [" + @fldName +"] asc"
end

set @strSQL = "select top " + str(@PageSize) + " * 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) + " * from ["
     + @tblName + "] where [" + @fldName + "]" + @strTmp + "(["
     + @fldName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["
     + @fldName + "] from [" + @tblName + "] where " + @strWhere + " "
     + @strOrder + ") as tblTmp) and " + @strWhere + " " + @strOrder

if @PageIndex = 1
begin
   set @strTmp = ""
   if @strWhere != ''
     set @strTmp = " where " + @strWhere

   set @strSQL = "select top " + str(@PageSize) + " * from ["
     + @tblName + "]" + @strTmp + " " + @strOrder
end

if @IsCount != 0
   set @strSQL = "select count(*) as Total from [" + @tblName + "]"

exec (@strSQL)

GO

Tags:实现 上千 万条

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