Which two statements are true regarding the USING clause in table joins?()
- A、It can be used to join a maximum of three tables
- B、It can be used to restrict the number of columns used in a NATURAL join
- C、It can be used to access data from tables through equijoins as well as nonequijoins
- D、It can be used to join tables that have columns with the same name and compatible data types
正确答案:B,D
答案解析:有
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