Question

Is the following possible?

I have 2 tables, for example:

Location:

Location_key | Location     | Site_key

           1 | First Floor  | 100
           2 | Second Floor | 100
           3 | Third Floor  | 100
           4 | Fourth Floor | 200
           5 | Fifth Floor  | 200

Sub_Location:

Sub_Location_key | Sub_Location | Location_key

               1 | Room A       | 1
               2 | Room B       | 2
               3 | Room C       | 3
               4 | Room D       | 1
               5 | Room E       | 2

I want to get all the sub locations within each location. So for example, if I’m getting site 100, I need to return something like:

First Floor
----------
Room A
Room D

Second Floor
----------
Room B
Room E

Answer 1

select l.Location, group_concat(Sub_Location)
from Location l
left outer join Sub_Location sl on l.Location_key = sl.Location_key
where l.Site_key = 100
group by l.Location 

edit

select l.Location, 
       group_concat(Sub_Location) as sublocations, 
       group_concat(a.name) as assets
from Location l
left outer join Sub_Location sl on l.Location_key = sl.Location_key
left outer join assets a on sl.sub_location_key = a.sub_location_key
where l.Site_key = 100
group by l.Location