The types of constraints supported in SQL are ____.
A) data types, indexes, and system catalogs
B) foreign keys, qualifiers, and naming conventions
C) user privileges, data types, and legal values
D) primary keys, foreign keys, and legal values

Question

Quizplus · Accepted Answer

SQL constraints include primary keys, foreign keys, and legal values (such as CHECK constraints) to ensure data integrity and enforce rules on the data in a database.

The Types of Constraints Supported in SQL Are ____