How to Use an ER Diagram Tool to Design Relational Databases
Database documentation often goes stale the same way. Someone draws a diagram during initial design and exports it to a wiki. The schema keeps changing, but the picture does not. Months later, a new engineer compares the diagram to the live database and has to work out which details are still accurate. The fix is to update documentation whenever the schema changes. An entity-relationship diagram (ERD), a visual map of tables and how they connect, can serve as both a design aid and a shared reference. It stays useful only if the team maintains it.
