How to return a count of a group_concat in sql?

Question

The query below returns all of different subscriptions a user has. In another column, I would like to return the count of how many times a given subscription occurs. Any advice on how do this?

I tried including

COUNT(GROUP_CONCAT(subscription_plan_id))

but it doesn't work.

SELECT GROUP_CONCAT(subscription_plan_id)
FROM
  subscriptions
WHERE 
  created_at BETWEEN '2014-01-01' AND '2014-01-31'
GROUP BY
  user_id
HAVING
  COUNT(subscription_plan_id) > 1

Desired output:

group_concat...count
1,2,3...2
2,3...5

Answer 1

Just put the count() in the select :

SELECT GROUP_CONCAT(subscription_plan_id), COUNT(subscription_plan_id) as NumSubs
FROM subscriptions
WHERE created_at BETWEEN '2014-01-01' AND '2014-01-31'
GROUP BY user_id
HAVING COUNT(subscription_plan_id) > 1;

Answer 2

Add count And Group by subscription_plan_id

SELECT GROUP_CONCAT(subscription_plan_id), COUNT(subscription_plan_id) as NumSubs FROM subscriptions WHERE created_at BETWEEN '2014-01-01' AND '2014-01-31' GROUP BY subscription_plan_id HAVING COUNT(subscription_plan_id) > 1;