Coding⏱️ 2 min read📅 2026-06-03

How to Fix: "INSERT IGNORE" vs "INSERT ... ON DUPLICATE KEY UPDATE"

Understand the difference between INSERT IGNORE and INSERT ... ON DUPLICATE KEY UPDATE to skip duplicate entries.

Quick Answer: Use INSERT ... ON DUPLICATE KEY UPDATE with a minimal update statement, e.g., `INSERT INTO table (column1, column2) VALUES ('value1', 'value2') ON DUPLICATE KEY UPDATE column3 = VALUES(column3);`

📋 Table of Contents

  1. 💡 How it Works
  2. 🚀 Benefits of Using ON DUPLICATE KEY UPDATE
  3. 🎯 Best Practices

To skip duplicate entries that would otherwise cause failure, you can use the INSERT ... ON DUPLICATE KEY UPDATE statement. This approach allows you to specify an update clause that will only be executed if a duplicate entry is found.

💡 How it Works

  • The INSERT ... ON DUPLICATE KEY UPDATE statement is similar to the INSERT IGNORE statement, but it allows you to specify an update clause.

🚀 Benefits of Using ON DUPLICATE KEY UPDATE

Advantages

  1. Allows you to update fields that are already present in the table.
  2. Prevents unnecessary updates, which can be beneficial for performance and data integrity.

    3. Example

    INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2') ON DUPLICATE KEY UPDATE column3 = 'new_value', column4 = 'another_new_value';

    🎯 Best Practices

    When using INSERT ... ON DUPLICATE KEY UPDATE, make sure to specify the columns that you want to update, and only include fields that need to be updated.

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