select z.COMP_ID from
(select DISTINCT c.* from comp c left join
(select P.COMP_ID , count(P.COMP_ID) as shipc ,sum(P.CARGO_CAPACITY_REFERENCE)as sumcargo
from ship p group by P.COMP_ID having P.COMP_ID is not null) v on c.COMP_ID = V.COMP_ID) z ;
重复列 导致的 字段无效
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