Sql 列“city.POPULATION”在选择列表中无效，因为它未包含在聚合函数或GROUP BY子句中

我正在创建一个查询，我看到了这个错误消息。 这是我试图执行的查询：

select D.ID_city
,      D.ID_year
,      D.NB_deaths
,      D.NB_births_M
,      D.NB_births_F
,      D.NB_population_AS
,      D.NB_population_ACL
,      COUNT( NB_births_M+ NB_births_F)/C.population as  Birthrate
,      COUNT(NB_deaths_M + NB_deaths_F) as Mortality
from   Demography D 
join   region C
on     (D.Id_city =C.Id_city)
group
by     D.ID_city
,      D.ID_year
,      D.NB_deaths_M
,      D.NB_births_M
,      D.NB_births_F
,      D.NB_population_AS
,      D.NB_population_ACL

由于在count aggregate函数之外使用该列，因此应将c.population包括在group by中：

COUNT( NB_births_M+ NB_births_F)/C.population

也使用此添加的D.NB_F，因为它也是必要的：

select D.ID_city
,      D.ID_year
,      D.NB_deaths
,      D.NB_births_M
,      D.NB_births_F
,      D.NB_population_AS
,      D.NB_population_ACL
,      COUNT( NB_births_M+ NB_births_F)/C.population as  Birthrate
,      COUNT(NB_deaths_M + NB_deaths_F) as Mortality
from   Demography D 
join   region C
on     (D.Id_city =C.Id_city)
group
by     D.ID_city
,      D.ID_year
,      D.NB_deaths_M
,      D.NB_deaths_F -- <-- added
,      D.NB_births_M
,      D.NB_births_F
,      D.NB_population_AS
,      D.NB_population_ACL
,      C.population -- <-- added

---

您的问题是什么？@user2315555:标题……您是否考虑过在GROUPBY子句中添加“city.POPULATION”列？还是将其从选择列表中删除？这个错误似乎不言自明……D.NB\u deatments\u F，c.population->add in group by可能重复@user3651955:需要更多帮助吗？谢谢你，ansewrs，我不想在group by中添加c.population，然后不要使用计数中的字段。但是在我的计算中，我需要除以总人口，计算出生率+出生率作为出生率