MySQL创建表语句

CREATE TABLE `students` (
  `StudentNo` int(4) NOT NULL AUTO_INCREMENT COMMENT ‘学号‘,
  `LoginPwd` varchar(20) NOT NULL COMMENT ‘密码‘,
  `StudentName` varchar(20) NOT NULL COMMENT ‘学生姓名‘,
  `Sex` tinyint(1) NOT NULL COMMENT ‘性别，取值0或1‘,
  `GradeId` int(11) NOT NULL COMMENT ‘年纪编号‘,
  `Phone` varchar(50) DEFAULT NULL COMMENT ‘联系电话，允许为空，即可选输入‘,
  `Address` varchar(255) DEFAULT NULL COMMENT ‘地址，允许为空，即可选输入‘,
  `BornData` datetime NOT NULL COMMENT ‘出生时间‘,
  `Email` varchar(50) DEFAULT NULL COMMENT ‘邮箱账号，允许为空，即可选输入‘,
  `IdentityCard` varchar(18) NOT NULL COMMENT ‘身份证号‘,
  PRIMARY KEY (`StudentNo`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT=‘学生信息‘;