为“数据透视表”多次指定了“ID”列答案

【问题标题】：The column 'ID' was specified multiple times for 'PivotTable'为“数据透视表”多次指定了“ID”列
【发布时间】：2018-01-22 04:34:28
【问题描述】：

SELECT PartyRelationshipID,[2] AS OrderGroup,[3] AS TaxStatus,[4] AS Area
FROM (
SELECT prs.PartyRelationshipID
,prs.PartyRelationshipSettingTypeID
,Value = CONVERT(INT, CASE WHEN IsNumeric(CONVERT(VARCHAR(12), prs.Value)) = 1 then CONVERT(VARCHAR(12), prs.Value) else 0 End)  
FROM [Party].PartyRelationshipSetting prs) AS SourceTable
INNER JOIN Party.PartyRelationship prship ON SourceTable.PartyRelationshipID = prship.ID
INNER JOIN Party.PartyRole pr ON prship.ToPartyRoleID = pr.ID
INNER JOIN Party.Organization org ON pr.PartyID = org.PartyID
PIVOT
(
SUM(Value)
FOR PartyRelationshipSettingTypeID IN ([2],[3],[4])
)AS PivotTable

我得到了

为“数据透视表”多次指定了“ID”列

但在上述查询中，我没有使用 SELECT * 语句，或者我为每个 ID 选择添加别名以避免冲突。这个错误发生在哪一部分，如何解决？

当我在代码中添加以下行时出现此错误。

INNER JOIN Party.PartyRole pr ON prship.ToPartyRoleID = pr.ID
INNER JOIN Party.Organization org ON pr.PartyID = org.PartyID

还有在哪里提取 WHERE 子句以便仅选择基于 prship.ToPartyRoleID 的条目。 WHERE 子句不适合 PIVOT 内部或外部。

【问题讨论】：

标签： sql-server pivot inner-join

【解决方案1】：

由于不止一个表有ID 列，因此您不能使用该语法进行数据透视，请在子选择中选择所需的列并进行数据透视

SELECT PartyRelationshipID,
       [2] AS OrderGroup,
       [3] AS TaxStatus,
       [4] AS Area
FROM   (SELECT PartyRelationshipID, Value, PartyRelationshipSettingTypeID --its important to select only the required columns
        FROM   (SELECT prs.PartyRelationshipID,
                       prs.PartyRelationshipSettingTypeID,
                       Value = CONVERT(INT, CASE
                                              WHEN Isnumeric(CONVERT(VARCHAR(12), prs.Value)) = 1 THEN CONVERT(VARCHAR(12), prs.Value)
                                              ELSE 0
                                            END)
                FROM   [Party].PartyRelationshipSetting prs) AS SourceTable
               INNER JOIN Party.PartyRelationship prship
                       ON SourceTable.PartyRelationshipID = prship.ID
               INNER JOIN Party.PartyRole pr
                       ON prship.ToPartyRoleID = pr.ID
               INNER JOIN Party.Organization org
                       ON pr.PartyID = org.PartyID)a 
PIVOT(SUM(Value) FOR PartyRelationshipSettingTypeID IN ([2],[3],[4]))AS PivotTable

【讨论】：

这是什么a：在INNER JOIN Party.Organization org ON pr.PartyID = org.PartyID)a
@HarshaW - subselect的别名
我收到The column 'ID' was specified multiple times for 'a'.' and “数据透视表”的“ID”列被多次指定。`@tarheel 的回答给了我结果
@HarshaW - 我的错......现在检查

【解决方案2】：

我相信您只需将) as SourceTable 移到整个from 子句之后。这当然意味着第一个inner join也得改成...ON prs.PartyRelationshipID = prship.ID

SELECT PartyRelationshipID
,[2] AS OrderGroup
,[3] AS TaxStatus
,[4] AS Area
FROM (
    SELECT prs.PartyRelationshipID
    , prs.PartyRelationshipSettingTypeID
    , Value = CONVERT(INT, CASE WHEN IsNumeric(CONVERT(VARCHAR(12), prs.Value)) = 1 then CONVERT(VARCHAR(12), prs.Value) else 0 End)  
    FROM [Party].PartyRelationshipSetting prs
    INNER JOIN Party.PartyRelationship prship ON prs.PartyRelationshipID = prship.ID
    INNER JOIN Party.PartyRole pr ON prship.ToPartyRoleID = pr.ID
    INNER JOIN Party.Organization org ON pr.PartyID = org.PartyID
    ) AS SourceTable
PIVOT
(
SUM(Value)
FOR PartyRelationshipSettingTypeID IN ([2],[3],[4])
)AS PivotTable

【讨论】：