最近在做一个几百万条数据的分页查询,研究了各种方案,在本机上用项目的实际数据库做测试,测试过程 is very 痛苦,不堪回首ing。现在废话不多说,直接上结果,相信这也是大多数搜索答案的人最愿意看的方式。
以下是存储过程的代码:
复制代码 代码如下:
CREATE PROCEDURE [dbo].[P_GridViewPager] (
@recordTotal INT OUTPUT, --输出记录总数
@viewName VARCHAR(800), --表名
@fieldName VARCHAR(800) = "*", --查询字段
@keyName VARCHAR(200) = "Id", --索引字段
@pageSize INT = 20, --每页记录数
@pageNo INT =1, --当前页
@orderString VARCHAR(200), --排序条件
@whereString VARCHAR(800) = "1=1" --WHERE条件
)
AS
BEGIN
DECLARE @beginRow INT
DECLARE @endRow INT
DECLARE @tempLimit VARCHAR(200)
DECLARE @tempCount NVARCHAR(1000)
DECLARE @tempMain VARCHAR(1000)
--declare @timediff datetime
set nocount on
--select @timediff=getdate() --记录时间
SET @beginRow = (@pageNo - 1) * @pageSize + 1
SET @endRow = @pageNo * @pageSize
SET @tempLimit = "rows BETWEEN " + CAST(@beginRow AS VARCHAR) +" AND "+CAST(@endRow AS VARCHAR)
--输出参数为总记录数
SET @tempCount = "SELECT @recordTotal = COUNT(*) FROM (SELECT "+@keyName+" FROM "+@viewName+" WHERE "+@whereString+") AS my_temp"
EXECUTE sp_executesql @tempCount,N"@recordTotal INT OUTPUT",@recordTotal OUTPUT
--主查询返回结果集
SET @tempMain = "SELECT * FROM (SELECT ROW_NUMBER() OVER (order by "+@orderString+") AS rows ,"+@fieldName+" FROM "+@viewName+" WHERE "+@whereString+") AS main_temp WHERE "+@tempLimit
--PRINT @tempMain
EXECUTE (@tempMain)
--select datediff(ms,@timediff,getdate()) as 耗时
set nocount off
END
GO