M

Mr. Dubey • 52.30K Points
Coach

Q. If a column contains 7 values and 6 distinct values, the cardinality is                      

(A) 7
(B) 6
(C) 13
(D) 1
Correct : Option (B)

Explanation:
 in mysql, the cardinality of a column is the number of distinct values that it contains. a column that contains the values 1, 2, 3, 4, 4, 5, 6 has a cardinality of six and not seven.

Share

Discusssion

Login to discuss.

Loading Comments....