schema definition

A schema definition is like a blueprint or map for organizing data in a database. It outlines the structure, including what kinds of data are stored, how they relate, and the rules for entering each piece. For example, it specifies that a customer record should include a name, email, and phone number, and how these pieces of information are connected. This helps ensure data consistency, accuracy, and easy retrieval, much like instructions for building a house ensure everything fits together properly.