SQLD · 모의고사 6회 · 18번

Question

다음 SQL 중 조회 결과로 행이 반환되는 것은?

Accepted Answer

SELECT * FROM DUAL WHERE NULL IS NULL AND NOT (2 = 3);

Answer

SELECT * FROM DUAL WHERE NOT (NULL = 7);

Answer

SELECT * FROM DUAL WHERE NULL <> 7 OR 2 = 3;

Answer

SELECT * FROM DUAL WHERE NULL > 7 AND 2 = 3;