Basic SQL Injection Tutorial - Appointment HackTheBox 

you were my best guide brother, im sad you didn't continue the playlist series. I hope everything is going good with you in life

you're the only one one youtube who explained the answers instead of just giving them to me. thanks from Spain 🇪🇸

actually you can use ' or "a"="a" # ( this is mysql injection query ) and bypass sql with ' or 1=1 limit 1 -- -+