![]() ![]() ON DUPLICATE KEY UPDATE statement and clause as an alternative approach for inserting into rows that might have duplicate UNIQUE or PRIMARY KEY values.īy only issuing INSERT or UPDATE instructions and never DELETE, utilizing INSERT. ON DUPLICATE KEY UPDATE to Update the Record if It Exists Else Insert It in the MySQL Table In this example, even though we only changed one item, the outcome shows that two rows were impacted because we DELETED the previous record and then INSERTED the new row to take its place. ![]() | id | department | employee_name | year_published | We’ve made the decision to change our department and joining_year of id = 101 record back to the original Operations record.
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