SQL查询中涉及空值的操作,正确的有
A: AGE IS NULL
B: AGE IS NOT NULL
C: AGE=NULL
D: NOT(AGE IS NULL)
A: AGE IS NULL
B: AGE IS NOT NULL
C: AGE=NULL
D: NOT(AGE IS NULL)
举一反三
- 【单选题】在SQL查询中,下列涉及空值查询的操作,不正确的是() A. age is null B. age is not null C. age=null D. not (age is null)
- 下列在SQL中涉及空值的操作条件,不正确的是 A: Age IS NULL B: Age IS NOT NULL C: Age= NULL D: NOT(Age IS NULL)
- SQL中,下列涉及空值的操作,不正确的是____。 A: AGE<br/>IS NULL B: AGE<br/>IS NOT NULL C: NOT(AGE<br/>IS NULL) D: AGE=NULL
- 下列在SQL中涉及空值的操作条件,不正确的是 A: A、Age IS NULL B: B、Age IS NOT NULL C: C、Age= NULL D: D、NOT(Age IS NULL)
- ●在SQL中,下列涉及空值的操作,不正确的是 (23) 。 (23) A.AGE IS NULL B.AGE IS NOT NULL C.AGE=NULL D.NOT(AGE IS NULL)(23) A.AGE IS NULL B.AGE IS NOT NULL C.AGE=NULL D.NOT(AGE IS NULL)