Which built-in returns a BOOLEAN value that indicated whether an objects internal ID is available?（）
- A、GET_ID
- B、ID_NULL
- C、ID_FIND
- D、FIND_ID
正确答案:B
答案解析:有
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Oracle认证考试
Oracle认证考试
Which built-in returns a BOOLEAN value that indicated whether an objects internal ID is available?（）
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