If the ALL keyword is included in the UNION, how many rows will be returned in the result set?

a. Equal to the sum of the number of rows returned by each SELECT statement.
b. Less than the sum of the number of rows returned by each SELECT statement.
c. Equal to or less than the sum of the number of rows returned by each SELECT statement, depending on whether there are duplicate row values.

a. Equal to the sum of the number of rows returned by each SELECT statement.

Computer Science & Information Technology

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