ReNumber Auto Increment column in SQL

问题

Heres my problem.

I have an autoincrement primary key in sql table lets say table look like this

ID  |  Name|

1     John

2     Jack

3     Bill 

4     Joe

Then i delete row 2 Jack

ID  |  Name|

1     John


3     Bill 

4     Joe

And what I want to achieve is to change id column so the table will look like this

ID  |  Name|

1     John


2     Bill 

3     Joe

Is there a way to do it ? thanks in advance

回答1:

I will never do that but you can:

1. create a new autoincrement primary key named ID2
2. delete ID column
3. rename ID2 column as ID

回答2:

Set identity_insert Table off;
Update Table set ID = 3 where ID = 4;
...
Set identity_insert Table on;

Where Table name is Table

来源：https://stackoverflow.com/questions/16691885/renumber-auto-increment-column-in-sql