1.创建数据库表,以员工信息表为例子: DROP TABLE IF EXISTS `em_info`; CREATE TABLE `em_info` ( `em_id` INT(50) NOT NULL AUTO_INCREMENT COMMENT '员工ID', `em_name` VARCHAR(100) NOT NULL COMMENT '员工姓名', `em_sex` VARCHAR(30) NOT NULL COMMENT '性别', `em_birthday` DATE NOT NU…