In which three cases would you use the USING clause?（）A、You want to create a nonequijoin.B、The tables to be joined have multiple NULL columns.C、The tables to be joined have columns of the same name and different data types.D、The tables to be joined have c
题目
In which three cases would you use the USING clause?（）
- A、You want to create a nonequijoin.
- B、The tables to be joined have multiple NULL columns.
- C、The tables to be joined have columns of the same name and different data types.
- D、The tables to be joined have columns with the same name and compatible data types.
- E、You want to use a NATURAL join, but you want to restrict the number of columns in the join condition.