In almost any application it’s common to want to aggregate some set of values together, commonly in a comma separated form. Most developers do this by running a query to get much of the raw data, looping over the data and pushing it into a set, appending each new value to the appropriate key. Hopefully, it’s not a surprise that there’s a much better way to do this with PostgreSQL. Postgres has a flexible and robust array datatype that comes with a variety of functions. Even without taki...
