Question

I need to retrieve the first record created by a customer, using only a WHERE clause. I cannot use LIMIT, ORDER BY, etc.

SELECT *
FROM mytable
WHERE customer_id = 1
  AND created = ? the earliest timestamp for that customer

Edit: In anticipation of those who will ask, it’s a limitation of a specific case in the current framework I’m using. Don’t worry about it. I just have to do it this way. If it can’t be done, just let me know it can’t be done.

Thanks in advance.

Edit2: Thanks everyone but I can’t use any joins either. Any more ideas or can it simply not be done?

Answer 1

SELECT * 
FROM mytable 
WHERE customer_id = 1 AND created IN (
    SELECT min(created) AS MinCreated
    FROM mytable
    WHERE customer_id = 1
)