Microsoft Access sql 查询以查找列中所有值都匹配的记录

Question

I have a similar to below:

ProductID	Division	OrdNum
1	011	123
1	705	123
1	660	123
2	011	511
2	705	412
2	660	216

I am trying to write a query that will return each product ID and if the OrdNum for all Divisions is the same it will return the OrdNum, and if the OrdNums are different it will return "Varies"

The results should look like this:

ProductID	OrdNum
1	123
2	Varies

Answer 1

Consider:

Query1:

SELECT DISTINCT Table1.ProductID, Table1.OrdNum FROM Table1;

Query2:

SELECT ProductID, Count(OrdNum) AS CountOfOrdNum
FROM Query1
GROUP BY ProductID;

Query3:

SELECT Table1.ProductID, IIf([CountOfOrdNum]=1,[OrdNum],"Varies") AS Ord
FROM Query2 INNER JOIN Table1 ON Query2.ProductID = Table1.ProductID
GROUP BY Table1.ProductID, IIf([CountOfOrdNum]=1,[OrdNum],"Varies");

Answer 2

Below query may work for you.

select t2.ProductID,iif(t2.OrdCount>1,"Varies",DLookup("[OrdNum]","[Table1]","[ProductID]="&t2.ProductID)) as OrdNum
from (select t1.ProductID, count(t1.ProductID) as OrdCount
from (select ProductID, OrdNum, Count(Division) AS CountOfDivision from Table1 group by ProductID, OrdNum) as t1 group by t1.ProductID) as t2

Answer 3

Just compare the min and max values:

Select 
    ProductID,
    IIf(Min(OrdNum) = Max(OrdNum), First(OrdNum), "Varies") As OrderNumber
From
    YourTable
Group By
    ProductID