Interview Questions
1. What is FOREIGN KEY constraint?
Foreign Key is a field in database table that is Primary key in another table. It can accept multiple null, duplicate values.
Example: We can have a DeptID column in the Employee table which is pointing to DeptID column in a department table
where it a primary key.
Submit an interview question
Submitted questions and answers are subject to review and editing, and may or may not be selected for posting, at the sole discretion of w3Sniff.
Get Started
Comments
Leave a Comment