A schema is a container of database objects with the following interesting related rules:

* A schema may contain different object types, like tables, indexes, views, procedures, functions, etc.

* A database user can be assigned with a default schema.

* Object names must be prefixed with schema names when referencing schemas outside your default schema.

* Every schema has a single owner (a database user). A database user may own multiple schemas.

* If you login name is mapped to the owner of a schema, you have full permissions on this schema.

* To drop a schema, you need to empty the schema first.