A FOREIGN KEY is a field in one table that refers to the PRIMARY KEY in another table...
Автор: 7TechTips
Загружено: 2025-10-06
Просмотров: 121
Описание:
A FOREIGN KEY is a field (or collection of fields) in one table that refers to the PRIMARY KEY in another table. What is its main purpose?
a) To speed up queries
b) To enforce data redundancy
c) To link two tables together
d) To define unique values
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