在MS SQLServer中交换两行保留原始主键，无需手动更新。

I have the following problem : I have rows like

我有以下问题:我有像这样的行

ID   CODE     NAME            .........
1    h1100h1  Cool example1   .........
2    h654441  Another cool1   .........

I would like to swap them retaining all old primary keys and constraints. Of course, I can easily solve this manually by updating the rows. I am kind of wondering whether anybody has any excellent solution for this kind of problem instead of just executing update command manually. I really really appreciate any suggestions or recommendations.

我想交换它们保留所有旧的主键和约束。当然，我可以通过更新行轻松地解决这个问题。我想知道是否有人对这类问题有很好的解决方案，而不只是手动执行update命令。我真的非常感谢你的建议和建议。

2 个解决方案

#1

I haven't tested this, but I think it will work. I'm assuming that id is a single-column Primary Key. If that's not the case then you will need to adjust this code slightly to handle the PK.

我还没有测试过这个，但是我想它会有用的。我假设id是一个单列主键。如果不是这样，那么您需要稍微调整这段代码来处理PK。

UPDATE
     T1
SET
     column_1 = T2.column_1,
     column_2 = T2.column_2,
     ...
FROM
     dbo.My_Table T1
INNER JOIN dbo.My_Table T2 ON
     T2.id =
          CASE
               WHEN T1.id = @id_1 THEN @id_2
               WHEN T1.id = @id_2 THEN @id_1
               ELSE NULL
          END
WHERE
     T1.id IN (@id_1, @id_2)

#2

-1

self join with an update is your only safe bet

自我加入更新是你唯一安全的选择

#1