在SQL中,下列涉及空值的操作中不正确的——。A.AGE IS NULLB.AGE IS NOT NULLC.AGE=NULLD.NOT(AGE IS NULL)
在SQL中,下列涉及空值的操作,不正确的是A.AGE IS NULLB.NOT(AGE IS NULL)C.AGE=NULLD.AGE IS NOT NULL
在SQL中,下列涉及空值的操作,不正确的是(23)。A.AGE IS NULLB.AGE IS NOT NULLC.AGE=NULLD.NOT(AGE ISNULL)
SQL中,下列涉及空值的操作,不正确的是()。A.AGE IS NULLB.AGE IS NOT NULLC.AGE = NULLD.NOT (AGE IS NULL)
在SQL中,下列涉及空值的操作,不正确的是()。A.AGE IS NULLB.AGE IS NOT NULLC.AGE = NULLD.NOT (AGE IS NULL)
SQL中,下列涉及空值的操作,不正确的是()。A.age IS NULLB.age IS NOT NULLC.age = NULLD.NOT (age IS NULL)
2、在SQL中,下列涉及空值的操作,不正确的是()。A.AGE IS NULLB.AGE IS NOT NULLC.AGE = NULLD.NOT(AGE IS NULL)
在SQL中,下列涉及空值的操作,不正确的是()。A.AGE IS NULLB.AGE IS NOT NULLC.AGE = NULLD.NOT(AGE IS NULL)
4、在SQL中,下列涉及空值的操作,不正确的是()。A.AGE IS NULLB.AGE IS NOT NULLC.AGE = NULLD.NOT (AGE IS NULL)