What is true regarding subquerie
题目
What is true regarding subqueries?（）
- A、The inner query always sorts the results of the outer query.
- B、The outer query always sorts the results of the inner query.
- C、The outer query must return a value to the inner query.
- D、The inner query returns a value to the outer query.
- E、The inner query must always return a value or the outer query will give an error.
