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Two things I learned here. Insert a record, and edit the last insert id. Alter table auto-increment, which will take sometime. It's better to just deal with the problem using #1


Autoincrement values can only be numeric (integer and floats types if I remember correctly). If you want to store S1, ...., S1000, just store an integer, and return the extra S on select or on client side: create table tbl(ID bigint not null primary key auto_increment,name varchar(100)) auto_increment=1; insert into tbl (name) values ('a'); ... select ...

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