甲骨文 sql 查询 select

Question

table游客

table留下来

table酒店

我想打印去过希尔顿但没去过大陆的游客的名字所以去过希尔顿和大陆的游客都不应该被打印

Answer 1

您可以使用 exists 和 not exists:

select t.*
from tourists t
where 
    exists (
        select 1
        from stay s
        inner join hotels h on h.hcode = s.hcode
        where s.tcode = t.tcode and h.name = 'Hilton'
    ) and not exists (
        select 1
        from stay s
        inner join hotels h on h.hcode = s.hcode
        where s.tcode = t.tcode and h.name = 'Continental'  
    )