I wanted to understand the types of keys in DBMS with examples and please mention which keys is most important.
Although there are multiple Important keys in DBMS, but each key has its own role.
Keys play an important role in the relational database. It is used to uniquely identify any record or row of data from the table. It is also used to establish and identify relationships between tables.
You can go through all the keys with example - https://www.scaler.com/topics/keys-in-dbms/
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