DECHEMA model

A database schema is like a blueprint that helps organize the data stored in a database. It includes things like the names of the tables, the data types and sizes of each column, and any relationships that exist between different tables. For example, if a database needs to track customers and their orders, the schema will list the tables needed (like one for customers and one for orders) and the columns like customer name and order date. The schema also specifies how the data from one table relates to the data in other tables (like which customer placed which order). Knowing this information helps the database know how to store and organize the data, and gives us a way of understanding and using it.