Real life example to reset the autoincrement value in mysql

Want to know the scenario where we need to reset the autoincrement value in database. If possible (Real life example I'm looking for).

There's no scenario where you need this. There are zero valid scenarios for that in this universe.

People will try to come up with a reason, but that reason won't be valid.

auto_increment:

• is a unique identifier
• is synthetic key. You must never rely on its value to figure out the record count or to sequentially enumerate invoices
• its primary job is to provide a unique identifier. InnoDB storage engine relies on it though, which is its secondary job - and something MySQL user is unaware of until they try to tamper with the auto_increment value.
• it's not meant to be sequential. It just uses sequential algorithm to obtain the next, unique value.

Therefore, the need to reset it doesn't exist. If you have the need to do so, you're using auto_increment wrong.

During development, you might want to truncate your tables to re-start the counter from 1, just to satisfy your own OCD. I do it too, but the reason isn't really valid and nothing happens if you leave it be.