sql - 插入 SQL Server 2005

Question

我有一个简单的问题。我有两张桌子FROM和TO. 我想将列Group从复制FROM到，TO但只复制与id_number. 它应该很简单，但我被卡住了。

insert into TO (Group)
   SELECT Group 
   FROM FROM
   WHERE FROM.id_number like TO.id_number

或者

INSERT INTO TO (Group)
   SELECT Group 
   FROM FROM
   WHERE id_number IN (SELECT id_number FROM TO)

这只是向表中添加了额外的列，它不会按照id_number...更新行。

任何的想法？

Answer 1

您说“仅与 id_number 匹配的行”。这意味着update不是insert。

update [TO] set [Group] = [FROM].[Group]
from [FROM]
inner join [TO] on [FROM].id_number = [TO].id_number