Which two are true regarding external tables? ()
- AExternal tables can be updated.
- BExternal tables are read-only tables.
- CIndexes can be created on external tables.
- DIndexes cannot be created on external tables.
Which two are true regarding external tables? ()
1、若a=5,b=3,c=4,逻辑表达式!(a+b)&;&;!c的值
若a=5,b=3,c=4,逻辑表达式!(a+b)&;&;!c的值为()A0B-1C1D2
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表达式10>5&&6%3的值是()A-1B非零值C0D1
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