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Microsoft: Access Queries and JET SQL FAQ

getting an incremental value

Create a sequential/ranking number with no code by dhookom
Posted: 12 Jun 13

You can create a query that numbers/ranks records within groups. For instance the Orders table in Northwind has fields:

OrderID unique autonumber

Assuming you want to display the records by customer with each record numbered from 1 to whatever based on the OrderDate. Each different customer would begin numbering back at 1.

The SQL view is:


SELECT Orders.OrderID, Orders.CustomerID, Orders.OrderDate, Count(Orders_1.OrderID) AS Rank
FROM Orders AS Orders_1 INNER JOIN Orders ON Orders_1.CustomerID = Orders.CustomerID
WHERE Orders.OrderDate>=[Orders_1].[OrderDate]
GROUP BY Orders.OrderID, Orders.CustomerID, Orders.OrderDate
ORDER BY Orders.CustomerID, Orders.OrderDate; 

If you don't want to group by CustomerID, just delete the join line between the two tables:

The new SQL view is:


SELECT Orders.OrderID, Orders.OrderDate, Orders.CustomerID, Count(Orders_1.OrderID) AS Rank
FROM Orders AS Orders_1, Orders
WHERE Orders.OrderDate>[Orders_1].[OrderDate]
GROUP BY Orders.OrderID, Orders.OrderDate, Orders.CustomerID
ORDER BY Orders.OrderDate, Orders.CustomerID; 

Orders on the same date will have the same rank value.

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