What is alternate key for?

Question

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. 4 июн. 2018 г.

What is an alternate key answer?

Answer. Answer: An alternate key is a key associated with one or more columns whose values uniquely identify every row in the table, but which is not the primary key.

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.

What is alternate key in SQL with example?

Alternate key is a secondary key it can be simple to understand by an example: Let's take an example of student it can contain NAME, ROLL NO., ID and CLASS. Here ROLL NO. is primary key and rest of all columns like NAME, ID and CLASS are alternate keys.

What is alternate and primary key?

Primary keys - Contain one or more columns whose combined values uniquely identify every row in a table. Each table can have only one primary key. Alternate keys - Contain one or more columns whose combined values uniquely identify every row in a table.

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