What are three examples of primary key?

Question

A primary key, also called a primary keyword, is a key in a relational database that is unique for each record. It is a unique identifier, such as a driver license number, telephone number (including area code), or vehicle identification number (VIN).

What is an example of a primary key?

For example, students are routinely assigned unique identification (ID) numbers, and all U.S. citizens have government-assigned and uniquely identifiable Social Security numbers. Street addresses or driver license numbers are examples of primary keys used to uniquely identify (respectively) locations or cars.

Which is the best example of a primary key?

Examples of Primary Key Valuesan automatically generated number.social security number.an email address (but only if two users can't share the same email address)vehicle identification number.driver licence number.some other special code that is unique to each record.What is a Primary Key? - Database.Guide

Can there be 3 primary keys?

It is possible for a table to have multiple candidate keys , which effectively behave similar to a primary key in that a candidate key is unique, NOT NULL , and is a singular representation of that table record.

What are the 5 types of primary key?

Primary Key.Candidate Key.Alternate Key.Super Key.Composite Key.Foreign Key.Unique Key.Types of Keys in Database Management System

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