: These are the connectors. For example, the trainer_id inside the Classes table "points" back to the main Staff table to ensure you don't assign a class to a trainer who doesn't exist. How to use this file

For a gym management system, this diagram typically maps out how members, classes, equipment, and payments all talk to each other. Here is a deep dive into what that file likely contains and how the data is structured. What is an .mwb file?

: The schedule of sessions offered. This links to the Staff table (who is teaching) and the Rooms table (where is it happening).

If you are seeing a file named , you are likely looking at a MySQL Workbench model file . This specific file format is used by database architects to design the "blueprint" of a database before any actual data is stored.