以下是： MS Access Match groups of rows in structure table
我的数据表如下：
GROUP | SUB_GROUP | ParentID | ChildID | Name | OWNER | Assembly_Level | Area | Position | ITEM_CREATION GROUP_1 | SubGroup_1 | Assembly_1 | Assembly_1 | Assembly_1_Name | User_1 | 0 | 0001 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_1 | Part_1 | Part_1_Name | User_1 | 1 | 0001 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_1 | Part_2 | Part_2_Name | User_1 | 1 | 0001 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_1 | Part_3 | Part_3_Name | User_1 | 1 | 0001 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_2 | Assembly_2 | Assembly_2_Name | User_2 | 0 | 0001 | 0,0,0 0,0,0 | 01-01-2017 GROUP_1 | SubGroup_1 | Assembly_2 | Part_1 | Part_1_Name | User_2 | 1 | 0001 | 0,0,0 0,0,0 | 01-01-2017 GROUP_1 | SubGroup_1 | Assembly_2 | Part_2 | Part_2_Name | User_2 | 1 | 0001 | 0,0,0 0,0,0 | 01-01-2017 GROUP_1 | SubGroup_1 | Assembly_2 | Part_3 | Part_3_Name | User_2 | 1 | 0001 | 0,0,0 0,0,0 | 01-01-2017 GROUP_1 | SubGroup_1 | Assembly_3 | Assembly_3 | Assembly_3_Name | User_3 | 0 | 0001 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_3 | Part_1 | Part_1_Name | User_3 | 1 | 0001 | 500,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_3 | Part_2 | Part_2_Name | User_3 | 1 | 0001 | 500,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_3 | Part_3 | Part_3_Name | User_3 | 1 | 0001 | 500,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_4 | Assembly_4 | Assembly_4_Name | User_4 | 0 | 0002 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_4 | Part_4 | Part_4_Name | User_4 | 1 | 0002 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_4 | Part_5 | Part_5_Name | User_4 | 1 | 0002 | 0,0,0 0,0,0 | 01-01-2016 GROUP_1 | SubGroup_1 | Assembly_4 | Part_6 | Part_6_Name | User_4 | 1 | 0002 | 0,0,0 0,0,0 | 01-01-2016
我在parfait的帮助下得到的查询：
SELECT DISTINCT
a1.GROUP,
a1.SUB_GROUP,
a1.ParentID AS Assembly,
(SELECT DISTINCT AssemblyTable.NAME
FROM AssemblyTable
WHERE AssemblyTable.ChildID=a1.ParentID) AS NAME,
(SELECT DISTINCT AssemblyTable.OWNER
FROM AssemblyTable
WHERE AssemblyTable.ChildID=a1.ParentID) AS OWNER,
a1.Area,
(SELECT DISTINCT AssemblyTable.ITEM_CREATION
FROM AssemblyTable
WHERE AssemblyTable.ChildID=a1.ParentID) AS ITEM_CREATION,
a2.ParentID AS CLONED_ASSEMBLY,
(SELECT DISTINCT AssemblyTable.NAME
FROM AssemblyTable
WHERE AssemblyTable.ChildID=a2.ParentID) AS CLONE_NAME,
(SELECT DISTINCT AssemblyTable.OWNER
FROM AssemblyTable
WHERE AssemblyTable.ChildID=a2.ParentID) AS CLONE_OWNER,
(SELECT DISTINCT AssemblyTable.ITEM_CREATION
FROM AssemblyTable
WHERE AssemblyTable.ChildID=a2.ParentID) AS CLONE_CREATION
FROM (SELECT * FROM AssemblyTable ORDER BY AssemblyTable.ITEM_CREATION ASC) AS a1
INNER JOIN (SELECT * FROM AssemblyTable ORDER BY AssemblyTable.ITEM_CREATION ASC) AS a2
ON (a1.ParentID < a2.ParentID)
AND (a1.Area = a2.Area)
AND (a1.[Position] = a2.[Position])
AND (a1.ChildID=a2.ChildID)
WHERE a1.ParentID<>a2.ParentID
ORDER BY a1.GROUP, a1.SUB_GROUP, a1.Area, a1.ParentID;
我偶尔会看到以下输出：
Assembly | Cloned Assembly | Area Assembly_2 | Assembly_1 | 0001
尽管我在加入和显示结果之前，之后和期间对数据进行了排序，但是在Assembly_2之前创建了Assembly_1，但是在它之后显示了它？关于如何强制左手装配列成为最早创建的项目的任何想法？
另外，我想要解决的另一个问题，以及只有大数据集才能发现的问题是，当你得到多个匹配时，匹配的程序集也会显示在列表中，即：
Assembly | Cloned Assembly | Area Assembly_2 | Assembly_1 | 0001 Assembly_2 | Assembly_6 | 0001 Assembly_1 | Assembly_6 | 0001
尽管这是一个完全合法的匹配，但它是不必要的，因为Assembly_1和Assembly_6都与Assembly_2相匹配。对于这个问题，我尝试查询查询，如下所示：
SELECT *
FROM Cloned_Query As a3
WHERE a3.Assembly NOT IN (SELECT DISTINCT a1.Assembly AS Assembly
FROM Cloned_Query as a1
INNER JOIN Cloned_Query as a2 ON a1.Assembly=a2.CLONED_ASSEMBLY);
但是这会返回“No Current Record”？！我的理论是获取在Assemble和CLONED_ASSEMBLY列/字段中找到的项目列表，并从Assembly列中删除它们。
再次，非常感谢任何帮助！