The structure and organization of your database — which tables exist and how they relate to each other.
A schema is the blueprint of your Database. It defines which tables exist, what columns each table has, what data types they hold, and how tables relate to each other. The schema is the contract between your application and database.
You design a schema to organize data logically. A users table has columns like id, name, email. A posts table has id, content, user_id. The user_id column references users via a Foreign Key, creating a relationship. Good schemas prevent data duplication, ensure integrity, and support efficient queries. Migrations track schema changes over time.
Schema design is crucial for database development. A bad schema causes bugs, duplicates data, and makes queries slow. SQL is the language used to define and modify schemas.
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