What is alternate key in Rdbms with example?

Question

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. 15 июн. 2020 г.

What is alternate key in database with example?

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.

What are alternative keys?

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.

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. English-language keyboards have two Alt keys.

What is an alternate key in access?

Alternate keys correspond to unique customer identifiers in a third-party system. A student number from a student information system is one common alternate key type. You can use alternate keys to grant access to facilities at entry points in a similar way that you can with memberships.

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