What is an Alternate Key example?

Question

All the keys which are not primary key are called an Alternate Key. Example: In this table, StudID, Roll No, Email are qualified to become a primary key. But since StudID is the primary key, Roll No, Email becomes the alternative key. 19 февр. 2022 г.

What is an alternate key answer?

Alternate Key or Secondary Key is the key that has not been selected to be the primary key, but are candidate keys. However, it is considered a candidate key for the primary key. A candidate key not selected as a primary key is called alternate or secondary key.

Where is the alternate key?

On all keyboards, the Alt key is located in the bottom row, directly to the left of the space bar. In addition, English-language keyboards have a second Alt key (one to the left and one to the right of the space bar) to support ten-finger typing.

How do you declare an alternate key?

Rules for Alternate Key1The alternate key is a part of a candidate key but not a part of the primary key.2Defined by “UNIQUE”.3Alternate keys values should be unique.4If a table consists of only one candidate key, then it becomes the primary key; there will be no alternate key.How to Use Alternate Key in SQL? - eduCBA

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