Question

How many primary key and candidate key a table can have​

Answer 1

Answer:

Primary key is a Candidate key chosen to uniquely identify tuples in the table. Primary key values should be unique and non-null. There can be multiple Super keys and Candidate keys in a table, but there can be only one Primary key in a table.

Explanation:

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Answer 2

Answer:

$\huge\green\bigstar{\blue{\fbox{ \fbox{\orange{one primary key}}}}}\green\bigstar$