How do I change SQL query output?

Question

I'm using this simple SQL query to retrieve data from two tables in my MySQL database:

SELECT customer_id, domain_name
FROM customers_orders
INNER JOIN orders ON order_id = sub_id

The result is similar to this:

1114    somedomain.com
1115    anotherdomain.net
1116    domain1.org
1116    domain2.com

How do I tell it to give me an output that is rather similar to:

1114    somedomain.com
1115    anotherdomain.net
1116    domain1.org, domain2.com

So as to avoid having two lines with the same customer_id... I wonder if it is even possible with SQL? I'm a beginner in SQL and I would very much appreciate your help on this.

Thanks a lot!

Answer 1

Try somethin like this

SELECT customer_id, GROUP_CONCAT(domain_name SEPARATOR ',')
FROM customers_orders
INNER JOIN orders ON order_id = sub_id
GROUP BY customer_id

Answer 2

You can use this:

SELECT customer_id, GROUP_CONCAT(domain_name ORDER BY domain_name SEPARATOR ', ') domain_name
FROM customers_orders INNER JOIN orders 
ON order_id = sub_id
GROUP BY customers_orders.customer_id

Answer 3

Try next:

select customer_id, group_concat(domain_name separator ', ')
    from customers_orders group by customer_id

Answer 4

No, it isn't . It is possible via GROUP_CONCAT , as suggested by others. But I wouldn't advise to use it. It is better to handle this in your processing code. It will be easier to read and maintain.