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14. When the corresponding columns in a UNION have different names, what is the name of the column in the final result set? O

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Answer #1

14)

The answer is option a.

Explanation:

The union is used to combine the result set of two or more queries.

The respective columns should have the same data types.

when the names are different, the names from the first query will determine the name in the result set.

15)

The answer is option b.

The union can be used any number of times between two or more queries.

When we want to combine the result sets of more than two queries , the union can be used multiple times.

16)

The answer is option b(FROM).

The join is used to get the data from multiple tables.

The FROM clause in the select statement is used to specify the tables on which the join operation is being performed.

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