How to Achieve 'INSERT ... ON DUPLICATE KEY (do nothing)' Functionality in SQL?

Achieving "INSERT ... ON DUPLICATE KEY (do nothing)" Functionality

In the provided scenario, the objective is to insert a row into a table with a unique key without triggering an error or updating the row if the key already exists.

Option 1: INSERT ... ON DUPLICATE KEY UPDATE

While the provided syntax suggests an "INSERT ... ON DUPLICATE KEY UPDATE" option, it does not offer a way to explicitly instruct the database to "do nothing." Instead, it requires specifying update values for duplicate key cases.

Option 2: INSERT ... ON DUPLICATE KEY UPDATE>

An alternative approach is to use "INSERT ... ON DUPLICATE KEY UPDATE>

Option 3: INSERT IGNORE

For scenarios where errors are not a concern, the "INSERT IGNORE" syntax can be used. This approach ignores all errors that would have been raised by the insert operation, including duplicate key errors and autoincrement field exhaustion. It simply suppresses the error without modifying the existing rows.

Recommendations

For cases where errors are critical and autoincrement exhaustion is a concern, "INSERT ... ON DUPLICATE KEY UPDATE>

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