Explain denormalization,and why it may be appropriate to denormalize a set of tables.
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Q77: The disadvantages of normalization include _.
A)the elimination
Q78: To count the number of rows in
Q79: The advantages of normalization include _.
A)the elimination
Q80: To limit the number of rows retrieved
Q81: When a table is created using existing
Q83: A missing value is called a(n)_.
A)empty value
B)null
Q84: The SQL keyword IS NULL can be
Q85: Reviewing the work done on a table
Q86: When a table is created using existing
Q87: To check for null values in a
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