Question

I have a table of user group assignments, such as:

ID----UserName------Group
01    johnsmith     admin
02    sarahwilles   admin
03    johnsmith     testuser

I would like to display it as:

UserName-------Groups
johnsmith      admin, testuser
sarahwilles    admin

Is this possible via SQL?

Answer 1

Not in standard SQL, but MySQL** provides GROUP_CONCAT which will do exactly what you want.

SELECT foo, GROUP_CONCAT(DISTINCT bar ORDER BY bar) AS bars
FROM foo_table
LEFT JOIN bar_table ON bar_table.foo_id = foo_table.foo_id

** presuming that’s ok, since you’ve tagged the question with mysql