Which statement is true regarding the UNION operator?

Which statement is true regarding the UNION operator?

Question:

Which statement is true regarding the UNION operator?

Options:

By default, the output is not sorted.

Null values are not ignored during duplicate checking.

Names of all columns must be identical across all select statements.

The number of columns selected in all select statements need not be the same.

Correct Answer

The Correct Answer for this Question is

Null values are not ignored during duplicate checking.

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