What is a Schema
A database schema specifies how data is organized in a relational database. This includes logical constraints such as table names, fields, data types, and relationships between these entities. Schemas often use a visual representation to convey the architecture of a database and form the basis of an organization's data management conventions.
CodeStencil maintains a library of schemas for different types of industries and this help to cut down the effort recreated to create your own schema from scratch. All you have to do is look for a schema close enough to the database design you have in mind and then modify this to meet your specific need.
You can access the Schema Library from SCHEMA | Schema Library