Is each model linked to a separate table in the database?

Not necessarily. In most ORMs (for example, Django ORM, SQLAlchemy), a model usually corresponds to a table in the database, but this is not a strict rule.

• Sometimes one model can map to multiple tables (through inheritance or composite models).
• Sometimes multiple models can use a single table (for example, when using proxy models).
• It is also possible to create models without a direct correspondence to a table, for example, to represent data obtained from external sources.

Thus, the relationship between a model and a table depends on the specific implementation and architecture of the application.