Discussion
A phantom read occurs when a transaction rereads data it has previously read and finds modifications or deletions caused by a committed transaction.
Answer: B
Correct answer: False
What is described is a nonrepeatable read: rows already seen have been modified or deleted by a committed transaction. A phantom read is the appearance of new rows that were not there before. The distinction decides which isolation level is needed, since repeatable read prevents the first but not the second.
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