Oracle ORA-00979 - “不是 GROUP BY 表达式”

Question

有人可以帮我解决这个特定的查询吗？我在尝试运行此命令时遇到 ORA-00979：

select   t0.title, count (1) as count0, (select   count (1)
      from contract c1, se se1
      where c1.c_id = se1.c_id
      and se1.svc_id = 3
      and se1.deleted = 0
      and c1.deleted = 0
      and c1.c_date between to_date ('07.10.2000', 'dd.mm.yyyy') 
                        and to_date ('22.11.2010', 'dd.mm.yyyy')
      and c1.company = 0
      and c1.tdata.tariff = c0.tdata.tariff
    ) as count1
  from contract c0, se se0, tariff t0
  where c0.c_id = se0.c_id
  and se0.svc_id = 3
  and se0.deleted = 0
  and c0.deleted = 0
  and c0.c_date between to_date ('21.11.2000', 'dd.mm.yyyy') 
                and to_date ('06.01.2011', 'dd.mm.yyyy')
  and c0.company = 0
  and t0.tariff_id = c0.tdata.tariff
  group by t0.title

Answer 1

问题是您的子查询带有 select count(1) 部分。仅仅因为它有一个计数，实际上并不意味着它是一个聚合。它仍然是一个将应用于每一行的子查询，正如您所看到的，它使用不属于该组的值c0.tdata.tariff。

Answer 2

看起来标量子查询导致了问题——它既不是组函数，也不在 GROUP BY 列表中。

也许你可以用类似的方法来解决它：

select   t0.title, count (1) as count0, SUM(select   count (1) ...) AS count1
 ...

Answer 3

考虑到这似乎是同一查询在不同日期的两个实例（我在这里可能是错的......这是漫长的一天），您可能可以简化它并重写如下：

select
  t0.title, 
  count (case when c0.c_date between to_date ('21.11.2000', 'dd.mm.yyyy') 
                and to_date ('06.01.2011', 'dd.mm.yyyy') then 1 end) as count0,
  count (case when c0.c_date between to_date ('07.10.2000', 'dd.mm.yyyy') 
                and to_date ('22.11.2011', 'dd.mm.yyyy') then 1 end) as count1
from 
  contract c0, 
  se se0, 
  tariff t0
where 
  c0.c_id = se0.c_id
  and se0.svc_id = 3
  and se0.deleted = 0
  and c0.deleted = 0
  and (c0.c_date between to_date ('21.11.2000', 'dd.mm.yyyy') 
                and to_date ('06.01.2011', 'dd.mm.yyyy')
    or c0.c_date between to_date ('07.10.2000', 'dd.mm.yyyy') 
                        and to_date ('22.11.2010', 'dd.mm.yyyy'))
  and c0.company = 0
  and t0.tariff_id = c0.tdata.tariff
group by t0.title

Answer 4

您的分组依据需要包含选择列表中的所有非聚合列。在这种情况下，分组依据缺少子查询返回的 count1。