MySQL: GROUP_CONCAT with LEFT JOIN

Question

I\'m experiencing a problem with MySQL\'s \"GROUP_CONCAT\" function. I will illustrate my problem using a simple help desk database:

CREATE TABLE Tickets (
          


        

Answer 1

I think @Dylan Valade's comment is the simplest answer so I'm posting it as another answer: simply adding a GROUP BY Tickets.id to the OP's SELECT should fix the issue. It fixed my own issue.

However, for databases that are not small the accepted answer, especially if there are any predicates on Tickets.id appears to not involve a total table scan and so while the previous paragraph returns the correct results it appears to be much less efficient in my case.