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我在 SELECT RANK() over(Partition by...) 上使用 PIVOT 函数返回一个表格“矩阵”，显示我的哪些战争游戏朋友每支军队的胜利最多。我想将矩阵限制为仅显示每支军队排名前 3 的成员（例如，在下图中的“HE”列中，我想排除排名为“4”的突出显示记录）

陆军以成员获胜

我认为我需要包含 WHERE 或 TOP 子句，但无法确定它的位置。我试过在这个网站和谷歌上寻找，但找不到答案。抱歉，如果这是一个学习者的问题，但我对 SQL Server 还是很陌生。

这是两个表 [Armies] 和 [Battles]（电子表格格式）：- https://docs.google.com/spreadsheet/ccc?key=0Ana40VqkvVtRdDAwc1BRWnhsWEdaaTQzcFprQmlyeVE

这是我的代码：-

SELECT *
FROM
    (
    SELECT
        RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as ranks, ArmyMnemonic, Army, Member,
         COUNT(WDL) as Wins
    FROM
        [dbo].[Battles]

    INNER JOIN Armies on Army1 = Armies.ArmyNum

    Where
        WDL=2 and Home=1 -- represents a "Win"
    Group By
        Member, ArmyMnemonic, Army, WDL
    ) as rnk

PIVOT (sum(rnk.ranks) for ArmyMnemonic in([Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE])) as pvt

ORDER BY Wins Desc;

谢谢你提供的所有帮助。

创建表脚本：-

USE [WFBattlesDB]
GO

/****** Object:  Table [dbo].[Armies]    Script Date: 11/09/2012 13:24:15 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[Armies](
[ArmyNum] [int] NOT NULL,
[ArmyMnemonic] [nvarchar](3) NOT NULL,
[Army] [char](30) NOT NULL,
[Official] [bit] NULL,
[Active] [bit] NULL,
 CONSTRAINT [PK_Armies] PRIMARY KEY CLUSTERED

（[ArmyNum] ASC）WITH（PAD_INDEX = OFF，STATISTICS_NORECOMPUTE = OFF，IGNORE_DUP_KEY = OFF，ALLOW_ROW_LOCKS = ON，ALLOW_PAGE_LOCKS = ON）ON [PRIMARY]）ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

USE [WFBattlesDB]
GO

/****** Object:  Table [dbo].[Battles]    Script Date: 11/09/2012 13:25:35 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[Battles](
[keyBattle] [int] IDENTITY(1,1) NOT NULL,
[subDate] [datetime] NOT NULL,
[Member] [nvarchar](20) NOT NULL,
[Home] [bit] NOT NULL,
[Army1] [int] NOT NULL,
[Army2] [int] NOT NULL,
[WDL] [int] NOT NULL,
[PtsVal] [int] NULL,
[MVU] [nvarchar](30) NULL,
[Fun] [int] NULL,
[Luck] [int] NULL,
[Notes] [nvarchar](1500) NULL,
[Link] [nvarchar](255) NULL

) 开 [主要]

GO
4

3 回答 3

1

我添加了一个额外级别的子查询，以便WHERE可以应用一个简单的子句

SELECT *
FROM
    (SELECT * FROM ( --Subquery start
    SELECT
        RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as ranks, ArmyMnemonic, Army, Member,
         COUNT(WDL) as Wins
    FROM
        Battles

    INNER JOIN Armies on Army1 = Armies.ArmyNum

    Where
        WDL=2 and Home=1 -- represents a "Win"
    Group By
        Member, ArmyMnemonic, Army, WDL

    ) t where t.ranks <= 3 --New WHERE clause

    ) as rnk
PIVOT (sum(rnk.ranks) for ArmyMnemonic in([Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE])) as pvt
ORDER BY Wins Desc;
于 2012-11-09T13:17:21.693 回答
1

您不能ranks在WHERE子句中使用 the，因为它在PIVOT函数中使用。因此，您可以创建第二ranks列进行过滤。我在内部选择中创建了第二列：

RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as rankFilter

然后，您可以在WHERE子句中使用它：

SELECT Army, Member, Wins, [Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE]
FROM
(
    SELECT
        RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as ranks, ArmyMnemonic, Army, Member,
         COUNT(WDL) as Wins,
       RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as rankFilter
    FROM
        [dbo].[Battles]

    INNER JOIN Armies on Army1 = Armies.ArmyNum

    Where
        WDL=2 and Home=1 -- represents a "Win"
    Group By
        Member, ArmyMnemonic, Army, WDL
    ) as rnk

PIVOT (sum(rnk.ranks) for ArmyMnemonic in([Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE])) as pvt
where rankFilter <=3

ORDER BY Wins Desc;

或者您可以WHERE在以下子查询中应用PIVOT：

SELECT Army, Member, Wins, [Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE]
FROM
(
    select *
    from
    (
        SELECT
            RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as ranks, ArmyMnemonic, Army, Member,
             COUNT(WDL) as Wins
        FROM
            [dbo].[Battles]

        INNER JOIN Armies on Army1 = Armies.ArmyNum

        Where
            WDL=2 and Home=1 -- represents a "Win"
        Group By
            Member, ArmyMnemonic, Army, WDL
    )  rnk
    where rnk.ranks <= 3
) src
PIVOT (sum(ranks) for ArmyMnemonic in([Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE])) as pvt

ORDER BY Wins Desc;
于 2012-11-09T13:20:49.363 回答
0

将所有内容包装在另一个 select 语句中：

选择前 3 * 从 (

SELECT *
FROM
    (
    SELECT
        RANK() over(Partition by ArmyMnemonic Order by COUNT(WDL) desc, Member) as ranks, ArmyMnemonic, Army, Member,
         COUNT(WDL) as Wins
    FROM
        [dbo].[Battles]

    INNER JOIN Armies on Army1 = Armies.ArmyNum

    Where
        WDL=2 and Home=1 -- represents a "Win"
    Group By
        Member, ArmyMnemonic, Army, WDL
    ) as rnk

PIVOT (sum(rnk.ranks) for ArmyMnemonic in([Be],[Br],[DoC],[DE],[Dw],[HE],[Li],[OK],[OG],[Sk],[TE],[TK],[VC],[WoC],[WE])) as pvt

) 数据 ORDER BY Wins Desc

于 2012-11-09T13:13:03.867 回答