Question

My users submit information for locations. I’m trying to write a query that will tell me the number of submits they’ve done for each location along with that location’s name.

This query seems to be a start in the right direction. It returns the id for each location that the user has submitted information.

SELECT reports.location_id
FROM reports
WHERE reports.user_id =104
ORDER BY reports.locations_id

An example of the return from this query is:

locations_id
99
99
99
112
115
115

For my final html output; however, I would like to show something more along the lines of this:

   location_name  number_of_submits
    name_1        3
    name_2        1
    name_3        2

Is there a mysql query I could use to get this? Or would I need to use php to iterate through my query’s results (i.e. recognize 99 was returned 3 times and fetch 99’s name from the locations table, then recognize 112 was returned once and fetch its name, and so on).

Thank you…

Answer 1

Use GROUP BY / COUNT:

SELECT
    location_name,
    COUNT(*) AS number_of_submits
FROM reports
JOIN markers ON markers.id = reports.location_id
WHERE reports.user_id = 104
GROUP BY reports.location_id