MySQL 5.7: How to handle duplicate primary key errors during batch insert with ON DUPLICATE KEY UPDATE?
I've searched everywhere and can't find a clear answer. I'm working with issues when trying to perform a batch insert in MySQL 5.7 using the `ON DUPLICATE KEY UPDATE` syntax. My goal is to insert multiple records into a table, but if a record with the same primary key already exists, I want to update specific fields instead of throwing an behavior. Here's the SQL query I've been using: ```sql INSERT INTO users (id, name, email) VALUES (1, 'Alice', 'alice@example.com'), (2, 'Bob', 'bob@example.com'), (1, 'Alice Updated', 'alice.updated@example.com') ON DUPLICATE KEY UPDATE name = VALUES(name), email = VALUES(email); ``` However, I'm getting the following behavior when I run this query: ``` behavior 1062 (23000): Duplicate entry '1' for key 'PRIMARY' ``` I expected that the first entry with ID `1` would be updated with the new name and email, but it seems that the duplicate record in the batch is causing MySQL to reject the entire operation. I've also tried breaking the inserts into smaller batches and handling them one by one, but that feels inefficient considering I have thousands of entries to process. Is there a way to modify the query or my approach to handle this scenario correctly without generating errors for duplicates? Additionally, I'd like to understand if there are any performance implications of using this method with a large dataset, as well as best practices for batch inserts in MySQL. Has anyone else encountered this?