Using the First or Min function.

Mase5701

New Member
Joined
Dec 19, 2018
Messages
6
I have a table with all my Customer Orders and I'm trying to return a single record for the Earliest OrderPlaced but I cannot for the life of me return the single oldest Order Number according to the CustomerID.

I have 2 tables:
CustomerOrders Customers
OrderNumber (pk) CustomerID (pk)
OrderDate
OrderAmount*

I have 2 queries as such:

SELECT tblCustomers.CustomerID, Min(tblCustomerOrders.OrderDate) AS MinOfOrderDate
FROM tblCustomers INNER JOIN tblCustomerOrders ON tblCustomers.CustomerID = tblCustomerOrders.CustomerID
GROUP BY tblCustomers.CustomerID;


SELECT tblCustomerOrders.OrderNumber, tblCustomerOrders.OrderAmount, qryCustomerOrderMinDate.MinOfOrderDate
FROM qryCustomerOrdersMinDate LEFT JOIN tblCustomerOrders ON qryCustomerOrdersMinDate.CustomerID = tblCustomerOrders.CustomerID;

my subquery shows every record in the CustomerOrders table. I just want one record for each Customer #.




Am I stupid? This seems like such a simple issue but I've been stuck on it forver!
 

Joe4

MrExcel MVP, Junior Admin
Joined
Aug 1, 2002
Messages
51,177
Office Version
365
Platform
Windows
Welcome to the Board!

In your second query, you need to join on 2 fields, the CustomerID and the Date fields.
Otherwise, you really aren't selecting the single, minimum record for each Customer ID.
 
Last edited:

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