MySQL和PHP：联接和计数

Question

I want to select all users from my table where access_level_id!=0. I also want to count the number of entries in another table where the user id matches a field (this could be 0 or 100).

I have:

SELECT users.id, count(clients.id) as count FROM $db[users] as users 
                              LEFT JOIN $db[clients] as clients ON users.id=clients.salesrep_id
                              WHERE users.access_level_id!='0'

This is returning just a single number (17)

Answer 1

You have to group the results. Try adding GROUP BY users.id to your Query.