Which SQL clause is used to arrange rows into groups based on one or more columns?
Options
- A. ORDER BY
- B. GROUP BY
- C. HAVING
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
B. GROUP BY
Detailed Explanation
- GROUP BY: Groups rows that have the same values in specified columns.
- It is commonly used with aggregate functions.
- Example: SELECT department_id, COUNT(*) FROM employees GROUP BY department_id;