Which operator returns distinct results when combining two result sets?

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Multiple Choice

Which operator returns distinct results when combining two result sets?

Explanation:
Union returns distinct results when combining two result sets because it merges the rows and then removes any duplicates across the entire joined set. In other words, each unique row appears only once in the final result. This is different from Union All, which preserves every row and can include duplicates, and from Intersect, which returns only the rows common to both inputs, not all unique rows. Join, meanwhile, combines rows from two sources based on a specified condition and can produce a broader set of results that may include duplicates depending on the data and join type. So, when you want the combined output to have only unique rows, Union is the appropriate choice.

Union returns distinct results when combining two result sets because it merges the rows and then removes any duplicates across the entire joined set. In other words, each unique row appears only once in the final result. This is different from Union All, which preserves every row and can include duplicates, and from Intersect, which returns only the rows common to both inputs, not all unique rows. Join, meanwhile, combines rows from two sources based on a specified condition and can produce a broader set of results that may include duplicates depending on the data and join type. So, when you want the combined output to have only unique rows, Union is the appropriate choice.

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