Hence, in this tutorial of the Primary key and Foreign Key in SQL, we learned about the SQL Primary Key and SQL Foreign Key. moreover, we looked at how SQL Create Table Primary Key and SQL Create table Foreign Key. Also, we discussed the Primary Key and F

Yes we can update primary keys, but new value of our primary key must require primary key requirements. like uniqueness, not null, etc. Also, when creating the foreign key, you must create it with ON UPDATE CASCADE. If you specify “ON UPDATE CASCADE”

Primary key is used to identify data uniquely therefore two rows can’t have the same primary key. It can’t be null. It can’t be null. On the other hand, foreign key is used to maintain relationship between two tables.