SQL合并具有相同ID的行

因此，我有一个SQL查询，它返回一组结果，如：

ID     Data1      Data2      Data3      Data4
1,     Null,      Null,      Null,      SomeValue
1,     Null,      Null,      SomeValue, Null
1,     Null,      SomeValue, Null,      Null
1,     SomeValue, Null,      Null,      Null
2,     Null,      Null,      Null,      SomeValue
2,     Null,      Null,      SomeValue, Null
2,     Null,      SomeValue, Null,      Null
2,     SomeValue, Null,      Null,      Null

我需要做的是合并所有具有相同ID的数据，并生成两行完整数据，如下所示：

ID       Data1           Data2           Data3           Data4
1,     SomeValue,      SomeValue,      SomeValue,      SomeValue
2,     SomeValue,      SomeValue,      SomeValue,      SomeValue

有人知道这是否可能吗

我尝试使用GROUPBY，但它不允许使用select查询中的其余值

完整SQL语句：

SELECT      
DISTINCT(D.DocumentNumber) AS [PTW No], 
D.ListCustomField1 AS [Work Order], 
D.ListAssetNumber AS [KKS No],
D.ListWorkToBeDone AS [Description],
D.CurrentStatusName AS [PTW Status],
D.TypeName AS [Section],
dbo.Sem_fn_PTWReport_ProcessData('AreaPicklist', MDP.Value, DCV.ValueString) AS [Area],
dbo.Sem_fn_PTWReport_ProcessData('IssueDate', MDP.Value, D.ID) AS [Actual Start Date], 
dbo.Sem_fn_PTWReport_ProcessData('CloseDate', MDP.Value, D.ID) AS [Actual Finished Date], 
dbo.Sem_fn_PTWReport_ProcessData('Duration', MDP.Value, D.ID) AS [Duration], 
dbo.Sem_fn_PTWReport_ProcessData('Impact', MDP.Value, DCV.ValueString) AS [Potential Non-Availability],
dbo.Sem_fn_PTWReport_ProcessData('DerationWater', MDP.Value, DCV.ValueString) AS [Deration - Water],
dbo.Sem_fn_PTWReport_ProcessData('DerationPower', MDP.Value, DCV.ValueString) AS [Deration - Power],
dbo.Sem_fn_PTWReport_ProcessData('DeclarationNumber', MDP.Value, DCV.ValueString) AS [Availability Decl No/ Rev No]

FROM dbo.Document AS D LEFT OUTER JOIN
     dbo.DocumentControlValues AS DCV ON D.ID = DCV.DocumentId LEFT OUTER JOIN
     dbo.MapperDocumentProperty AS MDP ON DCV.ControlId = MDP.DocumentControlMapperId
WHERE D.Stereotype = '1' 
AND CAST(MDP.Name AS nvarchar(max)) = 'FriendlyName'
AND CAST(MDP.Value AS nvarchar(max)) IN ('AreaP1_Picklist', 'ImpactAvailabilityP3_TextBlock',         'DerationWaterP1_TextBox', 'DerationPowerP1_TextBox', 'DerationDeclarationNoP1_TextBox')  

欢迎光临

干杯，

---

戴夫。

很抱歉给你弄糊涂了。这就是我想建议的：

SELECT  (D.DocumentNumber) AS [PTW No], 
        MAX(D.ListCustomField1) AS [Work Order], 
        MAX(D.ListAssetNumber) AS [KKS No],
        MAX(D.ListWorkToBeDone) AS [Description],
        MAX(D.CurrentStatusName) AS [PTW Status],
        MAX(D.TypeName) AS [Section],
        MAX(dbo.Sem_fn_PTWReport_ProcessData('AreaPicklist', MDP.Value, DCV.ValueString)) AS [Area],
        MAX(dbo.Sem_fn_PTWReport_ProcessData('IssueDate', MDP.Value, D.ID)) AS [Actual Start Date], 
        MAX(dbo.Sem_fn_PTWReport_ProcessData('CloseDate', MDP.Value, D.ID)) AS [Actual Finished Date], 
        MAX(dbo.Sem_fn_PTWReport_ProcessData('Duration', MDP.Value, D.ID)) AS [Duration], 
        MAX(dbo.Sem_fn_PTWReport_ProcessData('Impact', MDP.Value, DCV.ValueString)) AS [Potential Non-Availability],
        MAX(dbo.Sem_fn_PTWReport_ProcessData('DerationWater', MDP.Value, DCV.ValueString)) AS [Deration - Water],
        MAX(dbo.Sem_fn_PTWReport_ProcessData('DerationPower', MDP.Value, DCV.ValueString)) AS [Deration - Power],
        MAX(dbo.Sem_fn_PTWReport_ProcessData('DeclarationNumber', MDP.Value, DCV.ValueString)) AS [Availability Decl No/ Rev No]
FROM    dbo.Document AS D LEFT OUTER JOIN
        dbo.DocumentControlValues AS DCV ON D.ID = DCV.DocumentId LEFT OUTER JOIN
        dbo.MapperDocumentProperty AS MDP ON DCV.ControlId = MDP.DocumentControlMapperId
WHERE   D.Stereotype = '1' 
        AND CAST(MDP.Name AS nvarchar(max)) = 'FriendlyName'
        AND CAST(MDP.Value AS nvarchar(max)) IN 
        (
            'AreaP1_Picklist',
            'ImpactAvailabilityP3_TextBlock',
            'DerationWaterP1_TextBox',
            'DerationPowerP1_TextBox',
            'DerationDeclarationNoP1_TextBox'
        )
GROUP BY (D.DocumentNumber)

---

如果id为1的Data1中有2个值，会发生什么情况？如果不能这样做，表的结构是否正确？（可能这有点麻烦）如果所有非分组列的每个组都有一个值，请尝试将

MAX（Data1）作为Data1，…

并将

group BY

子句添加回。@amdev，由于查询的结构，这永远不会发生，每行返回自己的一段数据。现在我需要加入他们together@programmer43229我不太明白你的意思，如果我在我的select子句中有10列，我相信我需要在GROUPBY中有10列，但实际上我只想按ID分组。我觉得接受这个作为解决方案很肮脏，但是。。。谢谢：）在我们开发代码从数据库中提取信息之前，这只是一个短期的解决方案！干杯，戴夫。就像我之前说的，这看起来像是一个黑客。无论如何，谢谢你接受它。：）当它起作用时我很惊讶，我只是想知道。。。为什么？哈哈，再次干杯！