MYSQL DATABASE INTERVIEW QUESTIONS

What is an UPSERT operation in MySQL?

How do you write a basic UPSERT command in MySQL?

What must a table have to use the UPSERT feature in MySQL?

How does MySQL determine when to update and when to insert in an UPSERT operation?

Can you update multiple columns in an UPSERT operation? How?

What are the implications of using UPSERT operations on performance?

Explain the use of the VALUES function in an UPSERT operation.

How does UPSERT handle NULL values when updating records?

What are some best practices for using UPSERT to ensure data integrity?

Describe a scenario where using UPSERT would be preferred over separate INSERT and UPDATE statements, and explain how you would implement it.