What is a alternate key Class 10?

Question

ALTERNATE KEYS is a column or group of columns in a table that uniquely identify every row in that table. A table can have multiple choices for a primary key but only one can be set as the primary key. All the keys which are not primary key are called an Alternate Key. 25 июн. 2022 г.

What is an 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 alternate key in table?

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.

What is primary key and alternate 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.

What is alternative key give a suitable example?

Select any one of the above key as Primary Key, for example, EmployeeSSN. The rest of the two keys would then be called Alternate Keys because they were candidates of Primary Key. Therefore, Employee_SSN and Employee_Phone are Alternate Keys.

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