Introduction to SQL Quiz App Download | Database Systems PDF e-Book
Database Systems MCQs: Chapter 15
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Null values present special problems in
The operation that operates on two relations and produces a relation as the result, is known to be
In SQL, the count of an empty collection is defined to be
We can test for the non-existence of tuples in a subquery by using the construct
A fixed-point data type number with user-specified precision, is known to be
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