Question

1.what is attributes?
2.explain alternate key?
3.what are extension of:
→MS ACCESS
→MYSQL
→ORG BASE​

Answer 1

Answer:

In computing, an attribute is a specification that defines a property of an object, element, or file. It may also refer to or set the specific value for a given instance of such. For clarity, attributes should more correctly be considered metadata. An attribute is frequently and generally a property of a property.

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. For example, where the primary key for a table may be the employee id, the alternate key might combine the first, middle, and last names of the employee.

extension specify the Microsoft Access Database file.