Which SQL Operator Removes Duplicates from Query Results?

Learn how the DISTINCT SQL operator removes duplicate rows from query results for cleaner data analysis.

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The DISTINCT operator can be used to remove duplicates from the result of an SQL query. This operator ensures that each row in the result set is unique, making it invaluable for cleaning up data and simplifying analysis.

FAQs & Answers

  1. What does the DISTINCT operator do in SQL? The DISTINCT operator filters out duplicate rows in the result set, returning only unique records.
  2. Can DISTINCT be used on multiple columns in SQL? Yes, DISTINCT considers all specified columns in the SELECT statement to determine uniqueness across combinations of those columns.
  3. Are there other ways to remove duplicates in SQL? Besides DISTINCT, techniques like using GROUP BY or window functions can also help remove duplicates depending on the scenario.

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