Question

I have a MySQL Table. I put the schema to this fiddle.
In my table when a user logs in I record him/her to mytable. In one day same user can log in several times. So I need to know how many times a user logged in each day.

I need an output like this:

• 2013-01-30
  — Michael – 2 times
  — John – 4 times

• 2013-01-29
  — Michael – 1 time
  — John – 1 time
  — Mary – 1 time
  — Dean – 1 time

• 2013-01-28
  — Michael – 3 times
  — Mary – 1 times

I tried this:

SELECT COUNT(*) AS "times", username, date
FROM mytable GROUP BY date ORDER BY date DESC

But it gave me this:
– 2013-01-30 – Michael – 6 times
– 2013-01-29 – John- 4 times
– 2013-01-28 – Michael – 6 times

Can you recommend a query for this?

Answer 1

Just add username to your GROUP BY clause.

SELECT COUNT(*) AS "times", username, date
FROM mytable 
GROUP BY date, username ORDER BY date DESC

http://sqlfiddle.com/#!2/b5701/11