下面哪种别名用法是正确的?(多选)
A.selectstaff_ id “id”from staffs; B.select staff_id as id from staffs; C.select staff_id id from staffs; D.select staff_id 'id' from staffs;正确答案ABC
下面哪种别名用法是正确的?(多选)
A.selectstaff_ id “id”from staffs; B.select staff_id as id from staffs; C.select staff_id id from staffs; D.select staff_id 'id' from staffs;正确答案ABC