What Does Schema Mean?
A schema is the structure behind data organization. It is a visual representation of how different table relationships enable the schema’s underlying mission business rules for which the database is created.
Techopedia Explains Schema
In a schema diagram, all database tables are designated with unique columns and special features, e.g., primary/foreign keys or not null, etc. Formats and symbols for expression are universally understood, eliminating the possibility of confusion. The table relationships also are expressed via a parent table’s primary key lines when joined with the child table’s corresponding foreign keys.
