What is SQL Injection?SQL injection is a technique that exploits a security vulnerability occurring in the database layer of an application. The vulnerability is present when user input is either incorrectly filtered for string literal escape characters embedded in SQL statements or user input is not strongly typed and thereby unexpectedly executed. Web pages which accepts parameters from user, and make SQL query to the database, are targeted. For Example, A web page with username and password, fires SQL query on the database to check...