12 · Databases & SQL
Schema
A database's blueprint
The structure of a database: which tables exist, their columns, and what type of data each holds.
Concrete example
Adding a “phone” column to the users table is a schema change.
A database's blueprint
The structure of a database: which tables exist, their columns, and what type of data each holds.
Adding a “phone” column to the users table is a schema change.