Question

Define primary key with example

Answer 1

Hey friend !! here is your answer

⭕️Primary key is the special & unique key. Primary key is used to identify for the particular person,thing or anything else.

✔️Primary key like Roll number , Scholar number ( in school records). Primary can't match with another person, or anything because it is unique which helps to identity the correct user or thing.

✅It doesn't contain null values or we can say empty space.

✅Example - mobile number which can't be same of two person

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⭐️Hope it helps you⭐️

#Rohan ( Maths aryabhatta)♥️