发布时间:2014-03-14 09:57:35
更多Java培训学习资料,请登录尚硅谷网站下载:www.atguigu.comSQL语句的多表查询方式例如:按照department_id查询employees(员工表)和departments(部门表)的信息。方式一(通用型):SELECT ... FROM ... WHERESELECT e.last_name,e.department_id,d.department_nameFROM employees e,departments dwheree.department_i.........【阅读全文】