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SQL injection

SQL injection is a code injection technique that might destroy your database and is one of the most common web hacking techniques. It involves the placement of malicious code in SQL statements, via web page input.

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Additional Reading

https://en.wikipedia.org/wiki/SQL_injection

https://www.bbc.co.uk/bitesize/guides/z37tb9q/revision/2

https://www.w3schools.com/sql/sql_injection.asp

https://portswigger.net/web-security/sql-injection

www.teachyourselfpython.com