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数据库相关:Oracle,Sql Server,MySql,DB2,informix,sql语句......
MySQL修改root密码

posted @ 2012-03-17 22:53 zJun's帛罗阁 阅读(435) | 评论 (0)  编辑

查看Oracle中锁表的sql语句

posted @ 2007-07-27 18:23 zJun's帛罗阁 阅读(14422) | 评论 (0)  编辑

[转] 破解MySQL的MD5函数
     摘要: As per the documentation on MySQL I moved the storage of passwords from using Password() to using MD5(). I read a number of places that stated that this was a method that couldn't be reversed and it was far more secure than the previous method. I was feeling confident that life was about to get a little more secure. While going through my daily RSS feeds and mailing lists for SpikeSource, I happenned upon a thread about someone discussing how easy it was to break MD5 hashes. It was a simple matt  阅读全文

posted @ 2007-01-17 16:22 zJun's帛罗阁 阅读(2458) | 评论 (0)  编辑

Oracle SQL 3则
     摘要: 1.如果存在就更新,不存在就插入用一个语句实;
2.分页算法;
3.抽取/删除重复记录;  阅读全文

posted @ 2006-10-10 16:49 zJun's帛罗阁 阅读(932) | 评论 (2)  编辑

[深入浅出Hibernate笔记] Hibernate中的继承关系
     摘要: Hibernate中支持3种形式实现继承关系:
1. Table per concrete class 表与子类之间独立一对一关系
2. Table per subclass 每个子类对应一张子表,并与主类共享主表
3. Table per class hierarchy 表与类一对多关系  阅读全文

posted @ 2006-08-16 15:15 zJun's帛罗阁 阅读(1081) | 评论 (0)  编辑

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