ORA-00918: column ambiguously defined解决之道

最近做一个项目，经常需要用到多表查询（Hibernate），通过需要分页等，于是经常会碰到 ORA-00918: column ambiguously defined错误。

该报错翻译过来：某一列定义模糊，经过多次测试，终于得到解决。尤其是在涉及到tablename.*，这里的*很容易出现这样的错误。

下面贴出我的代码：

<sql-query name="queryStoreByRes">
   select a.id id,
       a.resource_id resourceId,
       a.resource_type resourceType,
       a.kpi_id kpiId,
       a.value value,
       a.create_date createDate,
       a.status status,
       a.kpi_code kpiCode,
       a.configid configId,

a.configid configId,
       a.dateslot      dateslot,
       a.command_name commandName
from RES_MNT_STORE_DATA a
where a.id in (select max_id
                  from (select max(t.id) max_id, t.kpi_code kpi_code
                          from RES_MNT_STORE_DATA t
                         where t.resource_id = '66105'
                         group by t.kpi_code))
</sql-query>

发现木有？a.configid configId,被重复写了两遍，这在数据里执行时没有问题，但因为需要与java的实体类保持一致，放在程序里就出错了。

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