使用c＃更新MySql上的auto_increment ID列的值

Question

I am new to MySql and coding. i have an Aid column that is Primary Key and Auto Increment in settings. But while I delete a row it doesn't update the Aid.

I know that the code that i need in MySql is :

SET @a = 0;
UPDATE aircraft.l1201 SET l1201.Aid = @a := @a +1;

How can I translate this into c# code?

Answer 1

I recommend you don't try changing the default behaviour of AutoIncrement. Changing all IDs after deleting a row doesn't bring you any real advantages, but a lot of disadvantages, including a potentially high amount of update operations after every delete as well as the risk of destroying referential integrity (in case ON UPDATE CASCADE isn't used).

Refer to this answer on a related question , it sums up the topic quite well.