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Anonymous Asked in Cars &Transportation · 2 weeks ago

Which key can be used as primary key?

Contents
  1. What can be used as a primary key?
  2. Which key can be primary key in DBMS?
  3. What are the 5 types of primary key?
This Candidate key is called the Primary Key. There can be only one Primary key for a table. Depending on how the Candidate Key is constructed the primary key can be a single attribute or a group of attributes. But the important point to remember is that the Primary key should be a unique and non-null attribute(s).


What can be used as a primary key?

primary key (primary keyword) It is a unique identifier, such as a driver license number, telephone number (including area code), or vehicle identification number (VIN). A relational database must always have one and only one primary key.

Which key can be primary key in DBMS?

PRIMARY KEY in DBMS is a column or group of columns in a table that uniquely identify every row in that table. The Primary Key can't be a duplicate meaning the same value can't appear more than once in the table. A table cannot have more than one primary key.

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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