SQL · Question 16 · Easy
Which keyword is written after SELECT to remove duplicate rows from a query's result?
- UNIQUE
- DIFFERENT
- SINGLE
- DISTINCT
Answer and explanation
Answer: D. DISTINCT
Explanation: SELECT DISTINCT col ... returns each distinct combination of the selected values only once. UNIQUE is a column constraint, not a SELECT keyword in standard SQL.
Previous: Table A has one column x with rows: 1, 1, 2, NULL Table B has one column x… · Next: In a LIKE pattern, which wildcard matches exactly one character?
Practise sql
Try a fresh set of sql questions with an explanation after every answer, free and without signing up: SQL practice. Or sit a full placement mock test.
More sql questions
- Table Employee: id | name | dept | salary 1 | Asha | HR | 30000 2 | Ravi | IT…
- Table A has one column x with rows: 1, 1, 2, NULL Table B has one column x…
- Table A has one column x with rows: 1, 1, 2, NULL Table B has one column x…
- In a LIKE pattern, which wildcard matches exactly one character?
- If ORDER BY is used without ASC or DESC, in which order are the rows sorted?
- Table Orders: order_id | customer | city | amount 101 | Meera | Chennai | 1200…
- Which type of join returns all rows from both tables, matching rows where…
- Table Orders: order_id | customer | city | amount 101 | Meera | Chennai | 1200…
- Table Orders: order_id | customer | city | amount 101 | Meera | Chennai | 1200…
- Table Orders: order_id | customer | city | amount 101 | Meera | Chennai | 1200…
More technical & programming practice
Operating Systems · Computer Networks · Software Engineering · Cloud & DevOps · GenAI Basics · Pseudo-code · C Programming · Java
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge