How Can I Use a Python List as a Parameter in a Parameterized SQL Query?

Passing Python Lists to Parameterized SQL Queries

This guide demonstrates how to safely integrate Python lists as parameters within parameterized SQL queries. This method prevents SQL injection vulnerabilities.

Begin by selecting a placeholder for your parameters within the SQL query string. In SQLite, '?' is commonly used.

Next, dynamically generate a comma-separated string of placeholders, matching the length of your Python list. For instance, a three-element list would require three placeholders.

Now, construct your SQL query, embedding the generated placeholder string. The number of placeholders must precisely match the list's length.

Finally, execute the query using your database cursor, supplying the Python list as the parameter value.

This technique efficiently handles both integer and string list elements, eliminating the risk of SQL injection flaws.

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