下面____表达式能正确表示逻辑关系:"age≥18或age≤60"?
A: age>=18
or age
B: age>=18
| age
C: age>=18
&& age
D: age>=18
|| age
A: age>=18
or age
B: age>=18
| age
C: age>=18
&& age
D: age>=18
|| age
举一反三
- 下面哪一个表达式能正确表示逻辑关系:"age≥18 或age≤60"? A: age>=18 || age B: age>=18 or age C: age>=18 | age D: age>=18 && age
- 表达式“AGE BETWEEN 18 AND 24”等价于( )。 A: AGE>18 AND G<24 B: AGE>=18 AND G<24 C: AGE>18 AND G<=24 D: AGE>=18 AND AGE<=24
- 表达式“AGE BETWEEN 18 AND 24”等价于 A: AGE>18 AND AGE<24 B: AGE>=18 AND AGE<24 C: AGE>18 AND AGE<=24 D: AGE>=18 AND AGE<=24
- 设有关系表S(NO,NAME,AGE),其中AGE为年龄字段,则表达式AGE NOT BETWEEN 18 AND 24等价于() A: AGE<=18 OR AGE>=24 B: AGE<=18 0R AGE>24 C: AGE<18 OR AGE>=24 D: AGE<18 0R AGE>24
- 设有关系表S(NO,NAME,AGE),其中AGE为年龄字段,则表达式 A: E NOT BETWEEN 18 AND 24 等价于: B: AGE<=18 OR AGE>=24 C: AGE<=18 OR AGE>24 D: AGE<18 OR AGE>=24 E: AGE<18 OR AGE>24