Discussion
One common design problem when designing a database from existing data is the presence of inconsistent values in the received data.
Answer: A
Correct answer: True
Inconsistent values - the same thing recorded in different ways, with variant spellings, word orders or punctuation - are among the commonest problems in received data. They break grouping, counting and joining, and the standard way of exposing them is a GROUP BY on the column, which puts each variant in its own group.
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