程系
管理表——精选推荐
CREATE TABLE student(sno CHAR(10)NOT NULL PRIMARY KEY,sname VARCHAR(8),ssex CHAR(2),sbirthday datetime(2),saddress VARCHAR(50),sdept CHAR(16),speciality VARCHAR(20));CREATE TABLE course(cno CHAR(5)NOT...
html5中三级下拉菜单实现案例
html5中三级下拉菜单实现案例<!DOCTYPE html><html><head lang="en"><meta charset="UTF-8"><title>三级下拉菜单</title><style>div{margin:30px 180px;}ul{list-style:none;padding:0px;}...
