“Simple” SQL Query

Question

Each of my clients can have many todo items and every todo item has a due date.

What would be the query for discovering the next undone todo item by due date for eac

Answer 1

Some Jet SQL, I realize it is unlikely that the questioner is using Jet, however the reader may be.

SELECT c.name, t.description, t.timestamp_due
FROM (clients c 
      INNER JOIN 
         (SELECT t.client_id, Min(t.id) AS MinOfid
          FROM todos t
          WHERE t.timestamp_completed Is Null
          GROUP BY t.client_id) AS tm 
ON c.id = tm.client_id) 
INNER JOIN todos t ON tm.MinOfid = t.id