SQLi stands for SQL injection. SQL injection often abbreviated SQLi and pronounced as SQLeye. It is a common web application vulnerability that is probably not unknown to you. It occurs when a user is able to add or inject their own SQL query into the application. This means an attacker could read the database or modify data in the database, even use it to get access to the administration operations on the database.
SQL Injection Tools – 2018
SQLMap – Automatic SQL Injection And Database Takeover Tool