Foreign Keys and Database Relationships

Learn how a foreign key connects tables for coherence.

Understanding foreign keys in database

To establish a connection between two tables, the primary key of one table (also called the parent table) is utilized as a reference point within the other table. When utilized in a different table, this primary key is referred to as a foreign key. Foreign keys are instrumental in establishing relationships between tables, ensuring data coherence. Foreign keys act as bridges between tables, ensuring data integrity and logical connections.

For instance, to merge data from the recently created Product table with our modified SalesData table, we can utilize the ...

Get hands-on with 40+ tech skills courses.