Is alternate key and candidate key same?

Question

Candidate Key – is a set of attributes that uniquely identify tuples in a table. Candidate Key is a super key with no repeated attributes. Alternate Key – is a column or group of columns in a table that uniquely identify every row in that table. 25 июн. 2022 г.

What is a alternate key?

An alternate key (Alt key) is a key that is present on most computer keyboards and is considered a modifier key that can used similarly to the shift or control keys. In other words, the alternate key provides alternate input and operations when pressed in combination with other keys.

What is the other name of candidate key?

Specific candidate keys are sometimes called primary keys, secondary keys or alternate keys.

What is the difference between candidate key and alternate key Class 11?

The candidate key is a set of attributes that uniquely identify the rows in a table. An alternate key is a column or group of columns that uniquely identify every row in a table.

Is candidate key and composite key same?

Definition. A candidate key is a super key with no redundant attributes, while a composite key is a key that consists of two or more attributes that uniquely identify any row in the table. Thus, this is the main difference between candidate key and composite key.

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