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  • 高效的SQLSERVER分页查询(推荐)

    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：

    代码如下:
    [sql] view plaincopyprint?
    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  
    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：

    代码如下:
    [sql] view plaincopyprint?
    1. SELECT * FROM (　　SELECT TOP 30 * FROM (SELECT TOP 45030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC   
    SELECT * FROM (　　SELECT TOP 30 * FROM (SELECT TOP 45030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) 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：

    代码如下:
    [sql] view plaincopyprint?
    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  
    SELECT * FROM ARTICLE w1, 
(
    SELECT TOP 30 ID FROM 
    (
        SELECT TOP 50030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
    ) w ORDER BY w.YEAR ASC, w.ID ASC
) 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：

    代码如下:
    [sql] view plaincopyprint?
    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  
    SELECT * FROM ARTICLE w1 
    WHERE ID in 
        (
            SELECT top 30 ID FROM 
            (
                SELECT top 45030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
            ) w ORDER BY w.YEAR ASC, w.ID ASC
        ) 
    ORDER BY w1.YEAR DESC, w1.ID DESC

         平均查询100次所需时间：20S

    第五种方案：

    代码如下:
    [sql] view plaincopyprint?
    1. SELECT w2.n, w1.* FROM ARTICLE w1, (　　SELECT TOP 50030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE ) w2 WHERE w1.ID = w2.ID AND w2.n > 50000 ORDER BY w2.n ASC   
    SELECT w2.n, w1.* FROM ARTICLE w1, (　　SELECT TOP 50030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE ) w2 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：

    代码如下:
    [sql] view plaincopyprint?
    1. SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 ID FROM ARTICLE ORDER BY YEAR DESC, ID DESC) ORDER BY YEAR DESC,ID DESC   
    SELECT TOP 30 * FROM ARTICLE WHERE ID NOT IN(SELECT TOP 1000 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：80s

    第二种方案：

    代码如下:
    [sql] view plaincopyprint?
    1. SELECT * FROM  ( 　　SELECT TOP 30 * FROM (SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC   
    SELECT * FROM  ( 　　SELECT TOP 30 * FROM (SELECT TOP 1030 * FROM ARTICLE ORDER BY YEAR DESC, ID DESC) f ORDER BY f.YEAR ASC, f.ID DESC) s ORDER BY s.YEAR DESC,s.ID DESC

         平均查询100次所需时间：30S

    第三种方案：

    代码如下:
    [sql] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    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  
    SELECT * FROM ARTICLE w1, 
(
    SELECT TOP 30 ID FROM 
    (
        SELECT TOP 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
    ) w ORDER BY w.YEAR ASC, w.ID ASC
) 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：

    代码如下:
    [sql] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    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  
    SELECT * FROM ARTICLE w1 
    WHERE ID in 
        (
            SELECT top 30 ID FROM 
            (
                SELECT top 1030 ID, YEAR FROM ARTICLE ORDER BY YEAR DESC, ID DESC
            ) w ORDER BY w.YEAR ASC, w.ID ASC
        ) 
    ORDER BY w1.YEAR DESC, w1.ID DESC

         平均查询100次所需时间：13S

    第五种方案：

    代码如下:
    [sql] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    1. SELECT w2.n, w1.* FROM ARTICLE w1,( 　　SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 ORDER BY w2.n ASC   
    SELECT w2.n, w1.* FROM ARTICLE w1,( 　　SELECT TOP 1030 row_number() OVER (ORDER BY YEAR DESC, ID DESC) n, ID FROM ARTICLE) w2 WHERE w1.ID = w2.ID AND w2.n > 1000 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：

    代码如下:
    [sql] view plaincopyprint?在CODE上查看代码片派生到我的代码片
    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：https://www.cnblogs.com/zxktxj/p/4202645.html
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