A combination of several columns that together serve as the primary key is called what?
(a) foreign key
(b) composite key
(c) candidate key.
The database gives a way to store the data in tabular form.In one database there is many tables and all the tables are connected with the keys. The keys are the columns which is uniquely defined the each row.
Answer and Explanation:
(b) composite key :
The composite key is a collection of two or more columns which is distinguish the rows uniquely. In simple way we can say that...
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fromChapter 11 / Lesson 12
In this lesson, we'll be looking at databases, which are computer mechanisms for storing and retrieving data. Test your knowledge following the lesson with a quiz.