What database hacking$/$attack technique occurs when hackers type SQL code into a web form, and the web application that processes this input doesn$$t properly check and validate it$,$ thereby allowing the attacker to command the database to retrieve data and explore the database?

What database hacking$/$attack technique occurs when hackers type SQL code into a web form, and the web application that processes this input doesn$$t properly check and validate it$,$ thereby allowing the attacker to command the database to retrieve data and explore the database?

SQL joins

Social engineering

SQL injection

Ransomware