我想知道有地球的宽松,这些地球热爱各种类型的Spy和人类物种。
我很难撰写多篇内装,并加入了不同深度的行列。
我的尝试之一是:
select gal from Galaxy gal inner join gal.PlanetList planets
inner join planets.SattelitesList satts,
planets inner join planets.SpeciesList spec
where spec.Name = Human AND satts.Type = Spy
我知道这一工程,但它只有一个深度分支(如双 tree树的单一分支):
select gal from Galaxy gal inner join gal.PlanetList planets
inner join planets.SattelitesList satts where satts.Type = Spy
增 编
是否有这样的工作?
from
gal from Galaxy gal
join gal.PlanetList planets
join planets.SattelitesList satts
join planets.SpeciesList spec
where spec.Name = Human AND satts.Type = Spy
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