Schema
In plain terms
The structure defining how data is organized in a database.
Going deeper
A schema specifies tables, columns, types, and relationships, acting as the blueprint for stored data. It defines and constrains the data's shape.
Under the hood
Rigid in SQL (schema-on-write); NoSQL often defers structure (schema-on-read), trading safety for flexibility.
Examples
Table definitions, JSON Schema, database design, data modeling.
Think of it like...
Like the architectural plan dictating every room and how they connect.