꿈라CBT다음 SQL 실행 결과로 가장 적절한 것은?
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[TBL1]
| COL1 |
|---|
| 10 |
| 12 |
| 15 |
| 22 |
| 28 |
| 30 |
| 31 |
[TBL2]
| COL2 |
|---|
| 15 |
| 30 |
SELECT COL1 FROM TBL1 WHERE COL1 <= ALL (SELECT COL2 FROM TBL2);
- 110, 12, 15
- 215, 22, 28, 30
- 310, 12, 15, 22, 28, 30
- 410, 12, 15, 22, 28, 30, 31