mysql> CREATE DATABASE `a`; Query OK, 1 row affected (0.02 sec) mysql> CREATE DATABASE `b`; Query OK, 1 row affected (0.00 sec) mysql> USE `a`; Database changed mysql> CREATE TABLE `test` ( -> `id` INT(11) NOT NULL AUTO_INCREMENT, `data` VARCHAR(64) NULL, `id` INT(11) NOT NULL AUTO_INCREMENT, -> `create_time` TIMESTAMP NOT NULL, `data` VARCHAR(64) NULL, -> `update_time` TIMESTAMP NOT NULL DEFAULT