Use SQL to read and write to a database #117
Description
2. Key concepts of relational databases
The text "A database is called a relational database when it can model relationships between tables" is not correct. A database is called "relational" because it deals with "relations" which we for simplicity call "tables". Even a database containing single table is a relational database. The next sentence "For example, a graduate student might have a single professor as a doctoral advisor whereas that professor is the doctoral advisor for multiple students" can be retained but it is incorrect to use in for reasoning a database being relational.