1z0-071 Exam Dumps | Which statement will return a comma-separated list of employee names in alphabetical order for each department

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Question 98/139

Which statement will return a comma-separated list of employee names in alphabetical order for each department in the EMP table?

A. SELECT deptno,LISTAGG(ename, ' , ') WITHIN GROUP AS employee_list FROM emp GROUP BY deptno;

B. SELECT deptno,LISTAGG(ename, ', ') WITHIN GROUP AS employee_list FROM emp GROUP BY deptno ORDER BY ename;

C. SELECT deptno,LISTAGG(ename, ', ') WITHIN GROUP (GROUP BY deptno) AS employee_list FROM emp ORDER BY ename;

D. SELECT deptno,LISTAGG(ename, ', ') WITHIN GROUP (ORDER BY ename) AS employee_list FROM emp GROUP BY deptno;

Correct Answer: D

The LISTAGG function is used in Oracle to aggregate strings from data in a group specified by the GROUP BY clause, producing a single row of concatenated values. The correct syntax also specifies an ORDER BY clause within the WITHIN GROUP parenthesis to sort the values in the concatenated list.
The correct query is:
SELECT deptno, LISTAGG(ename, ', ') WITHIN GROUP (ORDER BY ename) AS employee_list FROM emp GROUP BY deptno; This statement will return a comma-separated list of employee names (ename) in alphabetical order for each department (deptno) in the EMP table.

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