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Database Systems Entrance Tests: Practice Test 50 (Chapter 15)
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The MCQs: The following query <br> select count (*) <br> from course is used to find; "Introduction to SQL" App (Android, iOS) 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 to study distance learning courses. Practice Modification of Database Quiz Questions, download Apple Book (Free Sample) for information and communication technology.
The following query
select count (*)
from course; is used to find
If the where clause predicate evaluates to either false or unknown for a tuple, that tuple
The command that deletes not only all tuples of r, but also the schema for r.
For membership in a relation, SQL allows testing of
The data type that is a finite subset of the integers that is machine dependent, is said to be
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