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Sqlserver数据库分页查询一直是Sqlserver的短板,闲来无事,想出几种方法,假设有表ARTICLE,字段ID、YEAR...(其他省略),数据53210条(客户真实数据,量不大),分页查询每页30条,查询第1500页(即第45001-45030条数据),字段ID聚集索引,YEAR无索引,Sqlserver版本:2008R2
第一种方案、最简单、普通的方法:
1 SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 45000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC;
平均查询100次所需时间:45s
第二种方案:
1 SELECT * FROM ( 2 SELECT TOP 30 * FROM ( 3 SELECT TOP 45030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC 4 ) f ORDER BY f.YEAR ASC, f.ID DESC 5 ) s ORDER BY s.YEAR DESC,s.ID DESC;
平均查询100次所需时间:138S
第三种方案:
1 SELECT * FROM ARTICLE w1, 2 ( 3 SELECT TOP 30 ID FROM 4 ( 5 SELECT TOP 50030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC 6 ) w ORDER BY w.YEAR ASC, w.ID ASC 7 ) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC;
平均查询100次所需时间:21S
第四种方案:
1 SELECT * FROM ARTICLE w1 2 WHERE ID in 3 ( 4 SELECT top 30 ID FROM 5 ( 6 SELECT top 45030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC 7 ) w ORDER BY w.YEAR ASC, w.ID ASC 8 ) 9 ORDER BY w1.YEAR DESC, w1.ID DESC;
平均查询100次所需时间:20S
第五种方案:
1 SELECT w2.n, w1.* FROM ARTICLE w1,( 2 SELECT TOP 50030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 3 WHERE w1.ID = w2.ID AND w2.n > 50000 ORDER BY w2.n ASC;
平均查询100次所需时间:15S
查询第1000-1030条记录
第一种方案:
1 SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN( 2 SELECT TOP 1000 ID FROM ARTICLE 3 ORDER BY YEAR DESC, ID DESC) 4 ORDER BY YEAR DESC,ID DESC;
平均查询100次所需时间:80s
第二种方案:
1 SELECT * FROM( 2 SELECT TOP 30 * FROM ( 3 SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f 4 ORDER BY f.YEAR ASC, f.ID DESC) s 5 ORDER BY s.YEAR DESC,s.ID DESC;
平均查询100次所需时间:30S
第三种方案:
1 SELECT * FROM ARTICLE w1, 2 ( 3 SELECT TOP 30 ID FROM 4 ( 5 SELECT TOP 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC 6 ) w ORDER BY w.YEAR ASC, w.ID ASC 7 ) w2 WHERE w1.ID = w2.ID ORDER BY w1.YEAR DESC, w1.ID DESC;
平均查询100次所需时间:12S
第四种方案:
1 SELECT * FROM ARTICLE w1 2 WHERE ID in 3 ( 4 SELECT top 30 ID FROM 5 ( 6 SELECT top 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC 7 ) w ORDER BY w.YEAR ASC, w.ID ASC 8 ) 9 ORDER BY w1.YEAR DESC, w1.ID DESC;
平均查询100次所需时间:13S
第五种方案:
1 SELECT w2.n, w1.* FROM ARTICLE w1,( 2 SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 3 WHERE w1.ID = w2.ID AND w2.n > 1000 4 ORDER BY w2.n ASC;
平均查询100次所需时间:14S
由此可见在查询页数靠前时,效率3>4>5>2>1,页码靠后时5>4>3>1>2,再根据用户习惯,一般用户的检索只看最前面几页,因此选择3 4 5方案均可,若综合考虑方案5是最好的选择,但是要注意SQL2000不支持row_number()函数,由于时间和条件的限制没有做更深入、范围更广的测试,有兴趣的可以仔细研究下。
以下是根据第四种方案编写的一个分页存储过程:
1 if exists (select * from dbo.sysobjects where id = object_id(N‘[dbo].[sys_Page_v2]‘) and OBJECTPROPERTY(id, N‘IsProcedure‘) = 1) 2 drop procedure [dbo].[sys_Page_v2] 3 GO 4 CREATE PROCEDURE [dbo].[sys_Page_v2] 5 @PCount int output, --总页数输出 6 @RCount int output, --总记录数输出 7 @sys_Table nvarchar(100), --查询表名 8 @sys_Key varchar(50), --主键 9 @sys_Fields nvarchar(500), --查询字段 10 @sys_Where nvarchar(3000), --查询条件 11 @sys_Order nvarchar(100), --排序字段 12 @sys_Begin int, --开始位置 13 @sys_PageIndex int, --当前页数 14 @sys_PageSize int --页大小 15 AS 16 SET NOCOUNT ON 17 SET ANSI_WARNINGS ON 18 IF @sys_PageSize < 0 OR @sys_PageIndex < 0 19 BEGIN 20 RETURN 21 END 22 DECLARE @new_where1 NVARCHAR(3000) 23 DECLARE @new_order1 NVARCHAR(100) 24 DECLARE @new_order2 NVARCHAR(100) 25 DECLARE @Sql NVARCHAR(4000) 26 DECLARE @SqlCount NVARCHAR(4000) 27 DECLARE @Top int 28 if(@sys_Begin <=0) 29 set @sys_Begin=0 30 else 31 set @sys_Begin=@sys_Begin-1 32 IF ISNULL(@sys_Where,‘‘) = ‘‘ 33 SET @new_where1 = ‘ ‘ 34 ELSE 35 SET @new_where1 = ‘ WHERE ‘ + @sys_Where 36 IF ISNULL(@sys_Order,‘‘) <> ‘‘ 37 BEGIN 38 SET @new_order1 = ‘ ORDER BY ‘ + Replace(@sys_Order,‘desc‘,‘‘) 39 SET @new_order1 = Replace(@new_order1,‘asc‘,‘desc‘) 40 SET @new_order2 = ‘ ORDER BY ‘ + @sys_Order 41 END 42 ELSE 43 BEGIN 44 SET @new_order1 = ‘ ORDER BY ID DESC‘ 45 SET @new_order2 = ‘ ORDER BY ID ASC‘ 46 END 47 SET @SqlCount = ‘SELECT @RCount=COUNT(1),@PCount=CEILING((COUNT(1)+0.0)/‘ 48 + CAST(@sys_PageSize AS NVARCHAR)+‘) FROM ‘ + @sys_Table + @new_where1 49 EXEC SP_EXECUTESQL @SqlCount,N‘@RCount INT OUTPUT,@PCount INT OUTPUT‘, 50 @RCount OUTPUT,@PCount OUTPUT 51 IF @sys_PageIndex > CEILING((@RCount+0.0)/@sys_PageSize) --如果输入的当前页数大于实际总页数,则把实际总页数赋值给当前页数 52 BEGIN 53 SET @sys_PageIndex = CEILING((@RCount+0.0)/@sys_PageSize) 54 END 55 set @sql = ‘select ‘+ @sys_fields +‘ from ‘ + @sys_Table + ‘ w1 ‘ 56 + ‘ where ‘+ @sys_Key +‘ in (‘ 57 +‘select top ‘+ ltrim(str(@sys_PageSize)) +‘ ‘ + @sys_Key + ‘ from ‘ 58 +‘(‘ 59 +‘select top ‘ + ltrim(STR(@sys_PageSize * @sys_PageIndex + @sys_Begin)) + ‘ ‘ + @sys_Key + ‘ FROM ‘ 60 + @sys_Table + @new_where1 + @new_order2 61 +‘) w ‘ + @new_order1 62 +‘) ‘ + @new_order2 63 print(@sql) 64 Exec(@sql) 65 GO
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原文地址:http://www.cnblogs.com/xiongzaiqiren/p/sql-paging.html