[三思笔记]全面学习Oracle分区表及分区索引 2008-04-15 关于分区表和分区索引(About PartitionedTables and Indexes) 对于 10gR2 而言,基本上可以分成几类: v Range(范围)分区 v Hash(哈希)分区 v List(列表)分区 v 以及组合分区:Range-Hash,Range-List. 对于表而言(常规意义上的堆组织表),上述分区形式都可以应用(甚至可以对某个分区指定 compress 属性),只不过分区依赖列不能是
类型是DependencyProperty的属性是依赖属性 依赖属性不同于普通的.Net属性,类似于一个计算过程,根据依赖的值得到最终值. 为什么引入依赖属性: MSDN原文 One of the primary architectural philosophies used in building WPF was a preference for properties over methods or events. WPF的设计思想是侧重属性胜于方法和事件. 实例 依赖属性对资源引用的支持 设
转:http://lijiejava.iteye.com/blog/786535 一对多双向关联(类Item与类Bid): Item类: public class Item { private int id; private String name; private Set bids = new HashSet(); ••• } Bid类: public class Bid { private int id; private double amount; private Item item; •
报错如下: Expression # of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘sss.month_id’ which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by 问题出现的原因: MySQL 5.7.5
安装了mysql5.7,用group by 查询时抛出如下异常: Expression # of SELECT list is not in GROUP BY clause and contains nonaggregated column 'userinfo.t_long.user_name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode