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sql 存儲(chǔ)過(guò)程分頁(yè)代碼 支持億萬(wàn)龐大數(shù)據(jù)量，需要的朋友可以參考下。
代碼如下:
CREATE PROCEDURE page
@tblName varchar(255), — 表名
@strGetFields varchar(1000) = ‘*’, — 需要返回的列
@fldName varchar(255)=’id’, — 排序的字段名
@PageSize int = 10, — 頁(yè)尺寸
@PageIndex int = 1, — 頁(yè)碼
@doCount bit = 0, — 返回記錄總數(shù), 非 0 值則返回
@OrderType bit = 0, — 設(shè)置排序類(lèi)型, 非 0 值則降序 0:asc 1:desc
@strWhere varchar(1500) = ”, — 查詢(xún)條件 (注意: 不要加 where)
@ID nvarchar(50)=’id’ –主表的列。。最好是主鍵
AS
declare @strSQL varchar(5000) — 主語(yǔ)句
declare @strTmp varchar(110) — 臨時(shí)變量
declare @strOrder varchar(400) — 排序類(lèi)
if @doCount != 0 begin
if @strWhere !=”
set @strSQL = ‘select count(*) as Total from ‘ + @tblName+ ‘ where ‘+@strWhere
else
set @strSQL = ‘select count(*) as Total from ‘ + @tblName + ”
end
–以上代碼的意思是如果@doCount傳遞過(guò)來(lái)的不是0，就執(zhí)行總數(shù)統(tǒng)計(jì)。以下的所有代碼都是@doCount為0的情況
else begin
if @OrderType != 0 begin
set @strTmp = ‘set @strOrder = ‘ order by ‘ + @fldName +’ desc’
–如果@OrderType不是0，就執(zhí)行降序，這句很重要！
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
–如果是第一頁(yè)就執(zhí)行以上代碼，這樣會(huì)加快執(zhí)行速度
end
else begin
–以下代碼賦予了@strSQL以真正執(zhí)行的SQL代碼
set @strSQL = ‘select top ‘ + str(@PageSize) +’ ‘+@strGetFields+ ‘ from ‘
+ @tblName + ‘ where ‘ + @fldName + ‘ ‘ + @strTmp + ‘( ‘+ @ID + ‘ ) 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 + ‘(‘
+ @ID + ‘) from (select top ‘ + str((@PageIndex-1)*@PageSize) + ‘ ‘
+ @fldName + ‘ from ‘ + @tblName + ‘ where ‘ + @strWhere + ‘ ‘
+ @strOrder + ‘) as tblTmp) and ‘ + @strWhere + ‘ ‘ + @strOrder
end
end
exec (@strSQL)
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