**A set tables, containing rows and columns that follow a schema** A relational database is a set of tables that contain rows and columns according to a defined schema. The tables are "relational" in that the data in each row of the table _relate_ to the column they are in. This is distinct from [[Non-Relational Databases]] (e.g. MongoDB, Neo4j) where each record may contain a different set of fields. **** # More ## Source ## Related - [[Primary Key]] - [[Tuple]] - [[Data Normalization Levels]]