Jpql：无分组依据

Question

我有（有效的）SQL查询

   select team
   from team
   join account a on team.account_id = a.id
   left join exchange_order eo on a.id = eo.account_id
   left join exchange_order_transaction eot on eo.id = eot.order_id
   having count(eot.id) = 0;

并希望将其翻译为jpql

    @Query("SELECT COUNT(t) " +
            "FROM Team t " +
            "         left join Account a on t.account = a.id " +
            "         left join ExchangeOrder eo on a.id = eo.account " +
            "         left join ExchangeOrderTransaction eot on eo.id = eot.order " +
            "HAVING count(eot) = 0")
    long countWithoutTransactions();

问题是，JPQL似乎不允许在没有“ group by”的情况下进行HAVING。但是在那种情况下 我不要任何东西。只想计算所有行。

有什么方法可以省略“分组依据”还是我应该如何构造该查询？

Answer 1

我认为您只想对exchange_order_transaction表进行左反连接。使用此查询：

select team.*
from team
join account a on team.account_id = a.id
left join exchange_order eo on a.id = eo.account_id
left join exchange_order_transaction eot on eo.id = eot.order_id
where eot.id is null;