本课内容目前为英文。
Queries inside queries
Who scored above the average? To answer, you first need the average. A subquery is a query in parentheses inside another query, and its answer feeds straight into the outer one.
本课内容目前为英文。
Who scored above the average? To answer, you first need the average. A subquery is a query in parentheses inside another query, and its answer feeds straight into the outer one.