Discover a world of knowledge and get your questions answered at IDNLearn.com. Discover thorough and trustworthy answers from our community of knowledgeable professionals, tailored to meet your specific needs.

A(n) _____ constraint contains an assertion, such as (PRICE > 0.0), that must always be true for the column on which it is defined.
A. Check
B. Unique
C. Foreign key
D. Primary key