Database Interface Designer user interface
The main Database Interface Designer window provides a graphical user interface in which to create and maintain MDQ files. These files contain database definitions that include information such as database name, connection information, queries, stored procedures, and so forth.
When you create a database/query file in the Database Interface Designer, a file named Database_Query File (which is the default file name) followed by an assigned, sequential number appears in the Navigator. This indicates that you can begin defining databases, queries, and so on. Save this database/query file (a file name with an MDQ extension), providing an appropriate name and location.