03 2015 档案

Cheat sheet of NFs of database
摘要：1st Normal Form DefinitionA database is in first normal form if it satisfies the following conditions:Contains only atomic valuesThere are no repeatin... 阅读全文
posted @ 2015-03-19 15:23 wbzhang 阅读(304) 评论(0) 推荐(0) 编辑