Hello Guys, So when we learn about keys in database or normalization or various normal forms, we come across the term functional dependency. What exactly is functional dependency? So the definition of functional dependency states that, A functional dependency is a constraint that specifies the relationship of one attribute to another attribute in a relation or a table. If you have not watched my previous videos on Database and DBMS concept click playlist link below: Normalization & Normal Forms | Playlist:    • Normalization & Normal Forms   Keys in DBMS | Playlist:    • Types of Keys | DBMS   Database and DBMS | Playlist:    • Database & DBMS   If you want to watch videos on operating system concepts use the links below: Deadlock - Operating System | Playlist:    • Deadlock - Operating System   Process - Operating System | Playlist:    • Process - Operating System   Types of Operating System | Playlist:    • Types of Operating System.   Other videos on the channel: What is compiler?: https://www.youtube.com/watch?v=Vi8npxRMGac If you find my videos helpful and if the videos help in clearing your concepts, like the video, share it with your friends, subscribe the channel and press the bell icon. :) #FunctionalDependency #Keys #DBMS