꿈라CBT다음 SQL의 결과로 가장 적절한 것은 무엇인가?
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[EMP]
| EMP_NAME | DEPT_ID | SAL |
|---|---|---|
| SMITH | 10 | 100 |
| ALLEN | 10 | 200 |
| WARD | 20 | 300 |
| JONES | 30 | 400 |
| MARTIN | 30 | 100 |
SELECT * FROM (SELECT DEPT_ID, SAL FROM EMP) PIVOT (SUM(SAL) FOR DEPT_ID IN (10 AS A, 20 AS B, 30 AS C));
- 1
10 20 30 300 300 500 - 2
10 20 30 200 300 400 - 3
A B C 300 300 500 - 4
A B C 200 300 400