使用 select into where not exists 查询时出现 SQL 错误

Question

我正在尝试将一个表插入另一个表，

insert into list2([PHONE])
select [column 0] + [column 1] as PHONE
from [list1]
where not exists (select * from list2
where list2.phone = [list1].phone)

但我收到一个错误：

Msg 207, Level 16, State 3, Line 1 Invalid column name 'phone'.

list2 上有 2 列，phone 和 area code。 phone 有完整的电话号码，area code 有区号。

list1 上也有 2 列，column 0 有区号，column 1 是电话号码的前 6 位。

我做错了什么？

Answer 1

您不能从WHERE 子句引用您在SELECT 列表中构造的列别名：

insert into list2([PHONE])
select [column 0] + [column 1] as PHONE
from [list1]
where not exists (select * from list2
where list2.phone = [list1].[column 0] + [list1].[column 1])

或者，您可以将phone 列的构造放入FROM 子句中的子查询中：

insert into list2([PHONE])
select PHONE
from (select [column 0] + [column 1] as PHONE from [list1]) l1
where not exists (select * from list2
where list2.phone = l1.phone)