摘要：
普通程序编写都需要多表联合查询，本例子是展示如何关联2个表查询的效果，多表可以模拟本例子扩展 Note.javapublicclassNote{privateintsid=0;privateStringsname=null;privateStringmajor=null;privateDatebirth=null;privateintbook_oid;publicintgetBook_oid(){returnbook_oid;}publicvoidsetBook_oid(intbookOid){book_oid=bookOid;}publicintgetSid(){returnsid;}pu. 阅读全文