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Introduction to SQL Quiz Book PDF | Database Systems App Download
Database Systems Cerification Guide: Practice Test 19 (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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