Why have multiple schemas in a database?

Why do we need different schema in database?

Why Are Database Schemas Important? Database schemas are important because they help developers visualize how a database should be structured. A project may only use a few tables and fields. Still, having a schema gives developers a clear point of reference about what tables and fields a project contains.

Can a DB have multiple schemas?

In the Oracle database system, the term database schema, which is also known as "SQL schema," has a different meaning. Here, a database can have multiple schemas (or “schemata,” if you're feeling fancy). Each one contains all the objects created by a specific database user.

How many schemas can be used in a database?

So, the maximum numbers of schemas in a database is limited to the maximum number of integer data type (2^31-1 is the max of int).

Can you have more than one schema?

A single user can own multiple schemas. Each user has a default schema. Objects created in a schema are owned by the schema owner by default, not by the user who created the object. A user can create objects in a schema if they have the ALTER SCHEMA permission on the schema.