老師，我爬格子看到說，這是三個資料表join的語法，您看行嗎？ 我看不太懂耶！ 可以改寫成您交授的語法嗎？ select a.id,a.name as a_name,b.name as b_name,c.name from project a left join customer b on a.customer_id = b.id left join sales c on a.customer_id = c.id