The SQL keyword IS NULL can be used to help ________.
A) count the number of columns in a table
B) count the number of rows in a table
C) count the number of null values in a column
D) count the number of values in a column
Correct Answer:
Verified
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
Q82: Explain denormalization,and why it may be appropriate
Q83: A missing value is called a(n)_.
A)empty value
B)null
Q85: Reviewing the work done on a table
Q86: When a table is created using existing
Q87: To check for null values in a
Q88: When accessing table structure,and determining the number
Q89: What are null values,and why are they
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