I tried http://code.google.com/p/feed-reader-lib but holy cow, talk about difficult to build. It has a nightmare of dependencies on Xerces and Xalan, both of which seem to be choking under the new Vis
目录1.创建数据库：2.创建表：3.约束：3.1.Not Null3.2.UNIQUE3.3.PRIMARY KEY3.4.FOREIGN KEY3.5.check3.6.DEFAULT撤销 DEFAULT 约束：1.创建数据库：
目录第一种建表方法：第开发者_MongoDB二种建表方法：总结--五个约束 --非空 not null
加载中,请稍侯......