Question

Possible Duplicate:
MySQL – Auto Increment after delete

I want to delete the last inserted ID on my database and restart the numbers.

For example:

ID = 1, 2, 3, 4, 5

If I delete 5, after I add again the ID should still be 5.

I think it’s ok to delete as I will just delete to the last inserted Id, so my data will not be unorganized.

My key is AUTO_INCEMENT and NOT NULL.

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Additional restriction:

If I have data (1,2,3,4,5), then 5 is the only one who is subject for deletion.

Answer 1

delete from mytable where id = 5;
alter table mytable auto_increment = 5;