2分法-通用存储过程分页-多维IT资讯

复制--/*-----存储过程分页处理孙伟 2005-03-28创建 -------*/ --/*----- 对数据进行了2分处理使查询前半部分数据与查询后半部分数据性能相同 -------*/ --/*-----存储过程分页处理孙伟 2005-04-21修改添加Distinct查询功能-------*/ --/*-----存储过程分页处理孙伟 2005-05-18修改多字段排序规则问题-------*/ --/*-----存储过程分页处理孙伟 2005-06-15修改多字段排序修改-------*/ --/*-----存储过程分页处理孙伟 2005-12-13修改修改数据分页方式为top max模式性能有极大提高-------*/ --/*-----缺点：相对之前的分法分页not in版本主键只能是整型字段,如主键为GUID类型请使用not in 模式的版本-------*/ CREATE PROCEDURE dbo.proc_ListPageInt ( @tblName nvarchar(200), ----要显示的表或多个表的连接 @fldName nvarchar(500) = *, ----要显示的字段列表 @pageSize int = 10, ----每页显示的记录个数 @page int = 1, ----要显示那一页的记录 @pageCount int = 1 output, ----查询结果分页后的IT技术网总页数 @Counts int = 1 output, ----查询到的记录数 @fldSort nvarchar(200) = null, ----排序字段列表或条件 @Sort bit = 0, ----排序方法，0为升序，通用1为降序(如果是存储多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如： SortA Asc,SortB Desc,SortC ) @strCondition nvarchar(1000) = null, ----查询条件,不需where @ID nvarchar(150), ----主表的主键 @Dist bit = 0 ----是否添加查询字段的服务器托管 DISTINCT 默认0不添加/1添加 ) AS SET NOCOUNT ON Declare @sqlTmp nvarchar(1000) ----存放动态生成的SQL语句 Declare @strTmp nvarchar(1000) ----存放取得查询结果总数的查询语句 Declare @strID nvarchar(1000) ----存放取得查询开头或结尾ID的查询语句 Declare @strSortType nvarchar(10) ----数据排序规则A Declare @strFSortType nvarchar(10) ----数据排序规则B Declare @SqlSelect nvarchar(50) ----对含有DISTINCT的查询进行SQL构造 Declare @SqlCounts nvarchar(50) ----对含有DISTINCT的总数查询进行SQL构造 if @Dist = 0 begin set @SqlSelect = select set @SqlCounts = Count(*) end else begin set @SqlSelect = select distinct set @SqlCounts = Count(DISTINCT +@ID+) end if @Sort=0 begin set @strFSortType= ASC set @strSortType= DESC end else begin set @strFSortType= DESC set @strSortType= ASC end --------生成查询语句-------- --此处@strTmp为取得查询结果数量的语句 if @strCondition is null or @strCondition= --没有设置显示条件 begin set @sqlTmp = @fldName + From + @tblName set @strTmp = @SqlSelect+ @Counts=+@SqlCounts+ FROM +@tblName set @strID = From + @tblName end else begin set @sqlTmp = + @fldName + From + @tblName + where (1>0) + @strCondition set @strTmp = @SqlSelect+ @Counts=+@SqlCounts+ FROM +@tblName + where (1>0) + @strCondition set @strID = From + @tblName + where (1>0) + @strCondition end ----取得查询结果总数量----- exec sp_executesql @strTmp,N@Counts int out ,@Counts out declare @tmpCounts int if @Counts = 0 set @tmpCounts = 1 else set @tmpCounts = @Counts --取得分页总数 set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize /**//**当前页大于总页数取最后一页**/ if @page>@pageCount set @page=@pageCount --/*-----数据分页2分处理-------*/ declare @pageIndex int --总数/页大小 declare @lastcount int --总数%页大小 set @pageIndex = @tmpCounts/@pageSize set @lastcount = @tmpCounts%@pageSize if @lastcount > 0 set @pageIndex = @pageIndex + 1 else set @lastcount = @pagesize --//***显示分页 if @strCondition is null or @strCondition= --没有设置显示条件 begin if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理 begin if @page=1 set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR(4))+ + @fldName+ from +@tblName + order by + @fldSort + + @strFSortType else begin set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR(4))+ + @fldName+ from +@tblName + where +@ID+ <(select min(+ @ID +) from (+ @SqlSelect+ top + CAST(@pageSize*(@page-1) as Varchar(20)) + + @ID + from +@tblName + order by + @fldSort + + @strFSortType+) AS TBMinID) + order by + @fldSort + + @strFSortType end end else begin set @page = @pageIndex-@page+1 --后半部分数据处理 if @page <= 1 --最后一页数据显示 set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@lastcount as VARCHAR(4))+ + @fldName+ from +@tblName + order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType else set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@pageSize as VARCHAR(4))+ + @fldName+ from +@tblName + where +@ID+ >(select max(+ @ID +) from(+ @SqlSelect+ top + CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) + + @ID + from +@tblName + order by + @fldSort + + @strSortType+) AS TBMaxID) + order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType end end else --有查询条件 begin if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2 --前半部分数据处理 begin if @page=1 set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR(4))+ + @fldName+ from +@tblName + where 11=1 + @strCondition + order by + @fldSort + + @strFSortType else begin set @strTmp=@SqlSelect+ top + CAST(@pageSize as VARCHAR(4))+ + @fldName+ from +@tblName + where +@ID+ <(select min(+ @ID +) from (+ @SqlSelect+ top + CAST(@pageSize*(@page-1) as Varchar(20)) + + @ID + from +@tblName + where (11=1) + @strCondition + order by + @fldSort + + @strFSortType+) AS TBMinID) + + @strCondition + order by + @fldSort + + @strFSortType end end else begin set @page = @pageIndex-@page+1 --后半部分数据处理 if @page <= 1 --最后一页数据显示 set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@lastcount as VARCHAR(4))+ + @fldName+ from +@tblName + where (11=1) + @strCondition + order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType else set @strTmp=@SqlSelect+ * from (+@SqlSelect+ top + CAST(@pageSize as VARCHAR(4))+ + @fldName+ from +@tblName + where +@ID+ >(select max(+ @ID +) from(+ @SqlSelect+ top + CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) + + @ID + from +@tblName + where (11=1) + @strCondition + order by + @fldSort + + @strSortType+) AS TBMaxID) + + @strCondition+ order by + @fldSort + + @strSortType+) AS TempTB+ order by + @fldSort + + @strFSortType end end ------返回查询结果----- exec sp_executesql @strTmp --print @strTmp SET NOCOUNT OFF GO 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