如何使用SQL脚本将一个表拆分为另一个表

Question

到目前为止我有这个代码：

DECLARE @AddressIDS TABLE
(
    AddressID int
)

INSERT INTO Address(Street1, City, StateCode, ZipCode)
OUTPUT inserted.AddressID INTO @AddressIDS
SELECT Street1, City, StateCode, ZipCode
    FROM Contact

现在我需要将@AddressIDS中的ID重新放回AddressID表的Contact。

这更好地描述了我在TSQL中要做的事情：

Answer 1

假设Street1 + City + StateCode + ZipCode是唯一的，或者多个联系人可以共享相同的AddressID，那么您不需要在中间步骤中输出AddressID值。您只需执行插入地址，然后执行：

UPDATE c 
  SET AddressID = a.AddressID
  FROM dbo.Contact AS c
  INNER JOIN dbo.Address AS a
  ON c.Street1 = a.Street1
  AND c.City = a.City
  AND c.StateCode = a.StateCode 
  AND c.ZipCode = a.ZipCode;