text: DROP TABLE IF EXISTS user;
  
  CREATE TABLE user
  (
  	id BIGINT(20) NOT NULL COMMENT '主键ID',
  	name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
  	age INT(11) NULL DEFAULT NULL COMMENT '年龄',
  	email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
  	PRIMARY KEY (id)
  );
  
  DROP SEQUENCE IF EXISTS SEQ_USER;
  CREATE SEQUENCE SEQ_USER START WITH 1000 INCREMENT BY 1;