Posted by: Pdfprep
Post Date: November 12, 2020
Which constraint can be used to ensure that identical values are never stored in a set of columns in a
table?
A . NOT NULL
B . Foreign key
C . Primary key
D . Informational constraint
Answer: C
Explanation:https://www.ibm.com/developerworks/data/library/techarticle/dm-0401melnyk/index.html
Leave a Reply