Question

I’m sure this will be quite simple for some one clued up in SQL but I think it needs a sub query or something. I have a table which basically has a load of order numbers in it and a reply column from an XML API. Either FAIL or SUCCESS.

A brand new row is inserted into the DB after every request. So there may be 5 FAILS for one order number, and on the 6th attempt a record is inserted saying SUCCESS.

How can I put out order numbers that ONLY have a FAIL status next to them?

This will allow me to figure out what records need looking into that continuously fail in the API request.

Answer 1

Try this, by grouping your orders with primary key (order_id)

SELECT * FROM
(
    SELECT GROUP_CONCAT(status) as status_combined, order_id
    FROM orders 
    GROUP BY order_id  
) AS order_tmp
WHERE status_combined NOT LIKE '%SUCCESS%'

Edit (As per asker comments)

SELECT * FROM
(
    SELECT GROUP_CONCAT(status) as status_combined, order_id
    FROM orders 
    JOIN certificates ON certificates.Ordernumber = orders.OrderNumber
    GROUP BY order_id  
) AS order_tmp
WHERE status_combined NOT LIKE '%SUCCESS%'

please make sure you need to join based on “Ordernumber” or “order_id”