Awesome explanation I've searched for explanation of keys in many websites and videos. Sir, your way of explaining things are very clear and much understandable. Thanks for the lecture.
Sir as you told primary key can not be updateded, and in example of students you took the class as a primary key, so if a student will clear the class then database should be updated. So our primary key should be something else.
What ..? You are wrong here .. Primary key attribute values are updatable ... I have done that : but make sure that it is unique from others in that attribute. Please correct it
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You are one of the best teachers I have seen online. From last 2 years your lectures are life saver for me in every semester.
Awesome explanation
I've searched for explanation of keys in many websites and videos. Sir, your way of explaining things are very clear and much understandable.
Thanks for the lecture.
Really you are a good teacher having excellent communication skills and depth subject knowledge .
Very simple, precise, and practical explanation.
Thank you so much for all of your videos. I've been taking a database class online and its nice to have some actual instruction led videos
Very clear! Thank you so much!
What a lecture sir.. thank you soo much
you are god , sir. dhanyavaad
Thank you sir.
Unique key can hold only one null value, so example can be different to explain this. But thanks for your time
Sir as you told primary key can not be updateded, and in example of students you took the class as a primary key, so if a student will clear the class then database should be updated. So our primary key should be something else.
Thank you Sir :)
What ..? You are wrong here ..
Primary key attribute values are updatable ...
I have done that : but make sure that it is unique from others in that attribute.
Please correct it