SQL injection 

A web hacking technique which invloves submitting information to a web script which uses SQL databases (for instance a username/password checking script) which modifies the code of the script to gain unauthorized access to anything from databases to server commands.

That website was too easy to gain admin access to. All I had to do was use SQL injection in the admin login script.

SQL injection by Powersurge December 12, 2004

SQL injection 

An unmeaning text that you paste by pressing unintentionally Ctrl+V in a text field.

Hey, what is an SQL injection?'); DROP TABLE users;--

SQL injection by LittleBobbyTables July 14, 2011

sql injection attack 

An SQL injection attack is when someone is able to destroy your website's database because someone was too lazy to add one extra line of code that sanitizes input before sending it off to the database.

How did they do a sql injection attack? I hired the most expensive web programmer craigslist had to offer!

sql injection attack by Mr.M$CEO July 20, 2014