Mysql - how to set auto-increment to start from zero

Question

I just want my mysql table id(primary key) to start from 0..

As I have seen, I used ALTER TABLE yourtable AUTO_INCREMENT =0 but it starts from 1..What is that I need

Answer 1

SET [GLOBAL|SESSION] sql_mode='NO_AUTO_VALUE_ON_ZERO'

NO_AUTO_VALUE_ON_ZERO affects handling of AUTO_INCREMENT columns. Normally, you generate the next sequence number for the column by inserting either NULL or 0 into it. NO_AUTO_VALUE_ON_ZERO suppresses this behavior for 0 so that only NULL generates the next sequence number.

This mode can be useful if 0 has been stored in a table's AUTO_INCREMENT column. (Storing 0 is not a recommended practice, by the way.)

Reference

Reference 2

Answer 2

You cannot force this to be zero. This is limited by auto_increment_offset server variable. The default value is 1, the range is [1 .. 65535].

More information: auto_increment_offset, How to set AUTO_INCREMENT step.