Database Systems MCQs – Practice Test 50 (Chapter 15)
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Download Introduction to SQL Learning App (Android & iOS) with MCQ: "Following query <br> select count (*) <br> from course is used to find"; with answers: printing (*) in the course relation, printing (*) as the attribute of the course relation, the number of attributes in the course relation, and the number of tuples in the course relation. Practice Modification of Database Quiz Questions, download Apple Book (Free Chapter) to gain database skills.
MCQ 246: The following query
select count (*)
from course; is used to find:
MCQ 247: If the where clause predicate evaluates to either false or unknown for a tuple, that tuple:
MCQ 248: The command that deletes not only all tuples of r, but also the schema for r.:
MCQ 249: For membership in a relation, SQL allows testing of:
MCQ 250: The data type that is a finite subset of the integers that is machine dependent, is said to be:
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