Question

What is primary key and alternate key candidate key?

Answer 1

Primary key,:

It is a special relational database table column designated to uniquely identify all table records.

Alternate key :

It is a key associated with one or more column whose values uniquely identify every row in the table.

Candidate key :

It is a column or set of columns in a table that can uniquely identify any database records without referring to any other data.

Answer 2

Answer:

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