Mysql 按联接表值选择

我加入了一些表，这样我就有了这样的结果表

IDnameval
1n1false
1n2true
1N3真
第二条真理
2N2真的
2n3真
3n1false
3N2真
3n3真

一个可能的解决方案是

select  distinct id
from    yourTable t1
join    yourTable t2
on      t1.id = t2.id
where   t1.name = n1 and t1.val = 'true' and
        t2.name = n2 and t2.val = 'true';

---

一个可能的解决办法是

select  distinct id
from    yourTable t1
join    yourTable t2
on      t1.id = t2.id
where   t1.name = n1 and t1.val = 'true' and
        t2.name = n2 and t2.val = 'true';