How Can I Safely Use a List of IDs in a MySQL IN Clause?

Imploding Lists for Secure MySQL IN Clauses

To safely use a list of IDs in a MySQL IN clause and avoid SQL injection, use MySQL's parameterization capabilities instead of manually imploding the list and escaping it yourself.

format_strings = ','.join(['%s'] * len(list_of_ids))
cursor.execute("DELETE FROM foo.bar WHERE baz IN (%s)" % format_strings, tuple(list_of_ids))

This approach has several advantages:

• Security: The data is passed as a parameter to MySQL's driver, ensuring that it's properly escaped and protected against injection.
• Simplicity: You don't need to perform manual quoting or escaping, which simplifies your code and reduces the risk of errors.
• Performance: Parameterization is often more efficient than imploding lists and manually escaping them.

Note that the data is passed as a tuple of values, which is safe for use in MySQL queries. The format_strings variable creates a comma-separated list of placeholders for the parameters.

The above is the detailed content of How Can I Safely Use a List of IDs in a MySQL IN Clause?. For more information, please follow other related articles on the PHP Chinese website!