INSERT ON DUPLICATE KEY UPDATE in MySQL

INSERT ON DUPLICATE KEY UPDATE in MySQL

INSERT ON DUPLICATE KEY UPDATE statement in MySQL is used to handle duplicate entries on a primary key or unique column. This statement works like a normal INSERT statement until a duplicate value is inserted in a primary key column....

Syntax

MySQL INSERT ON DUPLICATE KEY UPDATE statement syntax is:...

MySQL INSERT ON DUPLICATE KEY UPDATE Examples

Let’s look at some examples of the INSERT ON DUPLICATE KEY UPDATE statement in SQL and understand how it works....

Important Points About MySQL INSERT ON DUPLICATE KEY UPDATE

The INSERT ON DUPLICATE KEY UPDATE statement in MySQL allows you to insert new rows into a table. If a duplicate key violation occurs, it updates existing rows instead of throwing an error. This feature is designed to be efficient and easy to use. It is more efficient than executing a separate SELECT statement followed by an INSERT or UPDATE. This statement is a convenient way to ensure data integrity. Use this statement with caution, as it might lead to unintended data overwrites if not used properly....