How Can I Securely Use String Manipulation with SQL Wildcards in Python?

String Manipulation for SQL Wildcards in Python

When encountering difficulties using string formatting for SQL queries with wildcards in Python, it's essential to prioritize security by employing parameterized queries. This effectively prevents SQL injection attacks.

Consider the following secure alternative:

curs.execute("""SELECT tag.userId, count(user.id) as totalRows 
                  FROM user 
            INNER JOIN tag ON user.id = tag.userId 
                 WHERE user.username LIKE %s""", ('%' + query + '%',))

In this example, the query and any additional parameters are passed to the execute() function as distinct arguments. This approach ensures proper string handling and prevents malicious actors from exploiting vulnerabilities in the string formatting.

Additionally, you should be wary of attempting to escape wildcards manually, as this can introduce other potential issues. Instead, rely on parameterized queries to handle string manipulation securely and efficiently.

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