- Delete the original primary key column
- Add primary key columns
ALTER TABLE `表名` DROP `主键列`;
ALTER TABLE `表名` ADD COLUMN `主键列` bigint(20) NOT NULL AUTO_INCREMENT, ADD PRIMARY KEY(`主键列`);
ALTER TABLE `表名` DROP `主键列`;
ALTER TABLE `表名` ADD COLUMN `主键列` bigint(20) NOT NULL AUTO_INCREMENT, ADD PRIMARY KEY(`主键列`);