Question

下面是使用Select进行插入的SQL查询，它不起作用，请帮助解决问题：

 insert into Area Values (AreaId, AreaName, Pincode, CityId, StateId, CountryId)
    select CityId
    from Area
      join City On Area.CityId = City.CityId
      Join State on Area.StateId = State.StateId
      join Country on Area.CountryId = Country.CountryId;

Answer 1

该查询的目的是什么？您正在与其他人一起加入目标表（Area）并尝试在其中插入，这是数据已在Area表中显示的标记，并且您正在插入重复项或尝试更新空列现在。在这种情况下，您需要合并甚至更新。

UPDATE A
SET CityID = c.CityID,
    StateID = s.StateID,
    CountryID = co.CountryID
from Area a
join City c
    On a.CityId = c.CityId
Join State s 
    on a.StateId = s.StateId
join Country co
    on a.CountryId = co.CountryId;

如果您需要完全插入 - 请指定所有列，如下所示：

insert into Area Values (AreaId, AreaName, Pincode, CityId, StateId, CountryId)
select  a.AreaID,
        a.AreaName,
        a.Pincode,
        c.CityID,
        s.StateID,
        co.CountryID
from Area a
join City c
    On a.CityId = c.CityId
Join State s 
    on a.StateId = s.StateId
join Country co
    on a.CountryId = co.CountryId;

修改

insert into Area Values (AreaId, AreaName, Pincode, CityId, StateId, CountryId) select a.AreaID, a.AreaName, a.Pincode, c.CityID, s.StateID, co.CountryID from Area a LEFT join City c On c.CityName = @CityName LEFT Join State s on s.StateName = @StateName LEFT join Country co on co.CountryName = @CountryName;

@CityName，@StateName，@CountryName是存储下拉列表数据的变量。

Ms Sql Insert with select

1 个答案: