What is alternative key and example?

What is alternative key?

Alternate keys are those candidate keys which are not the Primary key. There can be only one Primary key for a table. Therefore all the remaining Candidate keys are known as Alternate or Secondary keys.

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.

What is alternate key in artificial intelligence?

Alternate Key: All Candidate Keys excluding the Primary Key are known as Alternate Keys. Artificial Key: If no obvious key, either stand alone or compound is available, then the last resort is to simply create a key, by assigning a unique number to each record or occurrence.

What is the use of alternate key in DBMS?

An alternate key is none other than a candidate key, so the use/role of an alternate key is the same. It means an alternate key is also used to identify those columns in a table that can uniquely identify all the records of the table.