I'm creating a dropdown menu which filters a job database. The dropdown menu filters the job locations (see below). I've finally got everything working, although I would like to add an 'all locations' option in the dropdown menu which when selected shows all the locations jobs are available. So far the dropdown menu is linked to my locations column in my database so the graph doesn't show any results when 'all locations' is selected.
How could I achieve this? Any help would be really appreciated! (I hope my question makes sense!)
Thanks in advance!