Q8. Which query requires explicit data type conversion?
Q8. Examine the description of the EMPLOYEES table:
NLS_DATE_FORMAT is set to DD-MON-YY.
Which query requires explicit data type conversion?
- (A). SELECT dept_id, AVG(MAX(salary)) FROM employees GROUP BY dept_id;
- (B). SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id;
- (C). SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id, join_date;
- (D). SELECT dept_id, MAX(AVG(salary)) FROM employees GROUP BY dept_id;
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