Its for SQL Server only. Any other RDBMS would have it's own similar query but using its own internal functions and views.

Duplicate post deleted

• This reply was modified 7 months, 2 weeks ago by chuckh1958. Reason: duplicate

This does not show database sizes but rather individual database file sizes. To do what I think you want it to do - show total space used per database, change it...

• This reply was modified 7 months, 2 weeks ago by chuckh1958.

A lot of words to just say "she works for the government".

Wow - 13.5 years later, SSMS 20 is still experiencing this bug. Thanks for your help!