Question

我有以下查询，我根据字段“必需”将一列拆分为不同的列。

SELECT 
Station, 
Line, 
[Tag Reference], 
FTN, 
IIF(Required = "TF", Required, "") AS [TF Required], 
IIF(Required = "TF", [Date Checked], "") AS [TF Date], 
IIF(Required = "TF", [User Checked], "") AS [TF User], 
IIF(Required = "ML", Required, "") AS [ML Required], 
IIF(Required = "ML", [Date Checked], "") AS [ML Date], 
IIF(Required = "ML", [User Checked], "") AS [ML User], 
Format

FROM [Tag Information]

ORDER BY 
Station, 
Line, 
[Tag Reference]

我得到的项目中每条记录都是自己的行，但我想将记录分组在一起。

IE。我正在获取此表，其中行被拆分，但我希望看到按标记引用分组的值。（与第二张表一样）

Station Line    Tag Reference   FTN TF Required TF Date TF User ML Required ML Date ML User Format
Clearbrook  1   SCADA[30].0                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].0     TF                      
Clearbrook  1   SCADA[30].1                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].1     TF                      
Clearbrook  1   SCADA[30].10                    ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].2                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].4                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].4     TF  7/12/2006   WPB             
Clearbrook  1   SCADA[30].5     TF  7/12/2006   WPB             
Clearbrook  1   SCADA[30].5                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].6                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].8                 ML  7/12/2006   WPB 
Clearbrook  1   SCADA[30].8     TF  7/12/2006   WPB             
Clearbrook  1   SCADA[30].9     TF  7/12/2006   WPB             
Clearbrook  1   SCADA[30].9                 ML  7/12/2006   WPB

我想看看这张表：

    Station Line    Tag Reference   FTN TF Required TF Date TF User ML Required ML Date ML User Format
    Clearbrook  1   SCADA[30].0     TF          ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].1     TF          ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].10                    ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].2                 ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].4     TF  7/12/2006   WPB ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].5     TF  7/12/2006   WPB ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].6                 ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].8     TF  7/12/2006   WPB ML  7/12/2006   WPB 
    Clearbrook  1   SCADA[30].9     TF  7/12/2006   WPB ML  7/12/2006   WPB

任何帮助都会很棒。我很茫然。

Answer 1

您应该能够使用GROUP BY查询来合并结果，如下所示：

假设您有一个名为[ThingStatus]的数据表......

ThingName  Status1  Status2
---------  -------  -------
foo        thing1          
foo                 thing2

您可以使用查询合并条目...

SELECT 
    ThingStatus.ThingName, 
    Max(ThingStatus.Status1) AS Status1, 
    Max(ThingStatus.Status2) AS Status2
FROM ThingStatus
GROUP BY ThingStatus.ThingName;

...它给你

ThingName  Status1  Status2
---------  -------  -------
foo        thing1   thing2

按字段拆分列并组合记录MS Access 2007

1 个答案: