sql-server - 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'.

在 上list2，有 2 列，phone并且area code。phone有完整的电话号码和area code区号。

在 上list1，还有 2 列，column 0分别是区号和column 1电话号码的前 6 位。

我究竟做错了什么？

Answer 1

您不允许SELECT从WHERE子句引用您在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)