Question

I have a mysql table structure like that:

id     int     primary key
name   varchar 
start_time float

the data may be like that:

id    name      start_time
1     tt1          20.3
2     tt3          19.5
3     tt1          23.1
4     tt1          40.1
5     tt4          20.5
6     tt3          44.2

I want the result set grouped by name and list all start_time in the each group like that:

name       start_times
tt1      (20.3,23.1,40.1)
tt3      (19.5,44.2)
tt4      (20.5)

And the order of the result set is the number of start_time in each group.

Thanks in advance 🙂

Answer 1

You could use GROUP_CONCAT FUNCTION.

SELECT name, GROUP_CONCAT(start_time ORDER BY start_time) AS start_times
FROM your_table GROUP BY name
ORDER BY COUNT(start_time)