2010年9月25日
database Index
摘要： A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of slower writes and increased storage space.Indexes can be created using one ... 阅读全文
posted @ 2010-09-25 15:43 Ready! 阅读(740) 评论(0) 推荐(0) 编辑