As the name suggests, RunSQLRun runs SQL statements.
It's not a database administration tool, but a tool for developers to execute queries. And while we're at it, it also has no savety belts: Don't try to select a trillion rows. However, it's almost never a good idea.
The following databases are supported:
You can use RunSQLRun to run queries against those databases and it'll will assist you with some schema information along the way.