2014年7月30日

Some SQL basics

摘要： 1, IndexAn index is a set of data pointers stored on disk associated with a single table. The main advantage is they greatly speed up select, update, ... 阅读全文

posted @ 2014-07-30 17:21 chayu3 阅读(252) 评论(0) 推荐(0) 编辑