Shulou(Shulou.com)06/01 Report--

Self-increasing primary key rearrangement of Mysql database tables

1. Delete the original primary key:

ALTER TABLE `Table name `DROP `id`

2, add a new primary key field:

ALTER TABLE `Table name `ADD `id` MEDIUMINT (8) NOT NULL FIRST

3. Set the new primary key:

ALTER TABLE `Table name `MODIFY COLUMN `id` MEDIUMINT (8) NOT NULL AUTO_INCREMENT,ADD PRIMARY KEY (id)

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