You don't mention the Progress/OpenEdge version you are using.
Progress itself does not provide a real SQL query tool as the Progress/OpenEdge database is not a SQL database in the first place. "Real" means that there is something like a query tool available, the SQL explorer, that, depending on the Progress/OpenEdge version, comes in GUI and CHAR variants. Recent versions of OpenEdge only proivder the CHAR variant of the SQL explorer.
Apart from that you can use any SQL Query tool that can make ODBC or JDBC connection to databases.
Heavy Regards, RealHeavyDude.