A schema is a collection of tables, views, procedures, indexes and other logical objects. Each schema is owned by a database user and has the same name as that user.

Because there is essentially a 1-to-1 relationship between schemas and users, you can think of a schema as a user and a user as a schema. In setting up for Webucator’s Oracle courses, students create the C##HR user and then ran a couple of scripts to create and populate schema objects for a fictional Human Resources company. This is one of Oracle’s demo schemas, which we review in this article.