What is foreign key in database?
- By Arsal Ahmed March-20-2018
- 645
A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables and it acts as a cross reference between tables. Because it references the primary key of another table and thereby establishing a link between them.
- The foreign shows relationship between two tables.
- When the primary key is inserted in first table and when the first table connects with the second table in database.
- Then the relationship shows the link between the two tables in sql server.
