Instruction
Alright, let's start with something easy to get you warmed up.
Exercise
Return the longitude of the tram stop with id = 5.
Stuck? Here's a hint!
The longitude is the X coordinate in PostGIS, so you'll need to use ST_X.

Alright, let's start with something easy to get you warmed up.
Return the longitude of the tram stop with id = 5.
The longitude is the X coordinate in PostGIS, so you'll need to use ST_X.
