Question

我试图运行此SQL语句，但似乎遇到了一个错误状态

Msg 8120，Level 16，State 1，Procedure MemberCountryCarLocation，Line   5
  专栏＆＃39; Country.Country_name＆＃39;在选择列表中无效，因为   它不包含在聚合函数或GROUP BY中   子句。

代码：

create view MemberCountryCarLocation
   (Member_ID, Country_Of_Rental, Home_Addr, Business_Name)
as
   select 
       M.member_Id, C.country_name, A.addr1, B.business_addr
   from 
       Member M, Country C, License L, Addr A, Bz_Addr B
   where 
       M.member_id = A.member_id
       and A.country_code = C.Country_code
       and B.addr_code = A.addr_code
       and M.member_id = 'M%'
   group by 
       M.member_id

Answer 1

如果您使用group by，则只能选择分组语句和聚合函数中的列，如sum()。

因此，您必须删除select

以内的group by子句中的所有值

select M.member_Id
from Member M, Country C, License L, Addr A, Bz_Addr B
where M.member_id = A.member_id
and A.country_code = C.Country_code
and B.addr_code = A.addr_code
and M.member_id = 'M%'
group by M.member_id

或者您必须将select子句中的所有值添加到group by：

select M.member_Id, C.country_name, A.addr1, B.business_addr
from Member M, Country C, License L, Addr A, Bz_Addr B
where M.member_id = A.member_id
and A.country_code = C.Country_code
and B.addr_code = A.addr_code
and M.member_id = 'M%'
group by M.member_id, C.country_name, A.addr1, B.business_addr

Answer 2

在这种情况下，您需要添加 group by 时选择的所有列名。

试试这个：

create view MemberCountryCarLocation
(Member_ID, Country_Of_Rental, Home_Addr, Business_Name)
AS

select M.member_Id, C.country_name, A.addr1, B.business_addr
from Member M, Country C, License L, Addr A, Bz_Addr B
where M.member_id = A.member_id
and A.country_code = C.Country_code
and B.addr_code = A.addr_code
and M.member_id = 'M%'
group by M.member_Id, C.country_name, A.addr1, B.business_addr

Answer 3

试试这个，从select子句中删除不在

组中的值

select M.member_Id
from Member M, Country C, License L, Addr A, Bz_Addr B
where M.member_id = A.member_id
and A.country_code = C.Country_code
and B.addr_code = A.addr_code
and M.member_id = 'M%'
group by M.member_id

阅读分组依据here

Answer 4

在对查询进行分组时，您只能选择要分组的字段。如果您需要其他字段，则需要在分组中添加它们，或使用聚合来计算要选择的值。

我添加了分组中的其他字段（假设您只从每个成员的每个tablke获得一个值），这允许您选择它们。

您应该使用join关键字来建立连接，而不是旧方式连接表，因为旧方法已被弃用。

我从查询中排除了表License，因为您没有将其用于任何事情或将其与任何内容进行匹配，因此它会导致交叉连接，只会复制其他表中的记录。

create view MemberCountryCarLocation
  (Member_ID, Country_Of_Rental, Home_Addr, Business_Name)
as

select
  M.member_Id,
  C.country_name,
  A.addr1,
  B.business_addr
from
  Member M
  inner join Addr A on M.member_id = A.member_id
  inner join Country C on A.country_code = C.Country_code
  inner join Bz_Addr B on B.addr_code = A.addr_code
where
  M.member_id = 'M%'
group by
  M.member_id,
  C.country_name,
  A.addr1,
  B.business_addr

考虑一下你是否真的需要分组。现在它只是作为distinct查询工作，除非你有重复的成员，否则不应该这样做。

SQL Server错误：似乎无法解决它

4 个答案: