最新 Javascr ipt学习 高清无码PDF 亚马逊5星推荐 Learning Javascr ipt is hell because of two problems. I remove the problems, and you start having fun. The first problem is retention. You remember only ten or twenty percent of what you read. That spells failure. To
最新 学习HTML CSS 高清无码 PDF 亚马逊5星推荐 Using the Smarter Way to Learn method, you actually learn HTML/CSS, you don’t just read about it. Research shows that you learn four times as effectively when you practice after you read. So each chapter is paired with
产品数据库设计时，经常遇到5星评价的情况，数据表如何设计才能即保证查询效率，又能减少数据冗余呢？
初步设计思路如下，请大家指正。
一，最终效果，
二，表结构 代码如下:CREATE TABLE IF NOT EXISTS `books` ( `id` int(8) NOT NULL auto_increment, `title` varchar(50) NOT NULL,`vote_1` int(8) unsigned NOT NULL,`vote_2` int(8) unsigned N
