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JDBC中的Statement和PreparedStatement的区别
以Oracle为例吧 Statement为一条Sql语句生成执行计划, 如果要执行两条sql语句 select colume from table where colume=1; select colume from table where colume=2; 会生成两个执行计划 一千个查询就生成一千个执行计划! PreparedStatement用于使用绑定变量重用执行计划 ...
分类:数据库   时间:2014-05-22 13:44:55    阅读次数:380
泛型类及方法的基本使用
1、定义 public class EntBase:where T: new() { public List GetListDemo() { var lst = new List(); for (int i = 1; i...
分类:其他好文   时间:2014-05-22 03:35:38    阅读次数:166
在where子句中经常使用的运算符
比较运算符> = = 大于、小于、大于(小于)等于、不等于BETWEEN ...AND...显示在某一区间的值IN(set)显示在in列表中的值,例:in(100,200)LIKE ‘张pattern’模糊查询 _ %IS NULL判断是否为空逻辑运算符and &&多个条件同时成立or ||多...
分类:其他好文   时间:2014-05-22 00:51:48    阅读次数:658
Advices and Best Practices for Magento developers
I think everyone who is interested in ecommerce development get familiar with Magento earlier or later. It’s a very popular platform, where a lot of m...
分类:其他好文   时间:2014-05-22 00:35:05    阅读次数:555
SQL分页
--第一种分页(TOP方式)--select * from T_Sys_User where User_Id in (select top 10 User_Id from T_Sys_User where User_Id not in(select top (10*0) User_Id from T...
分类:数据库   时间:2014-05-21 22:44:21    阅读次数:485
Mybatis分页插件2.0版本发布
v2.0更新内容: 1.支持Mybatis缓存,count和分页同时支持(二者同步) 2.修改拦截器签名,拦截Executor,签名如下: @Intercepts(@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})) 3.将Page类移到外面,方便调用...
分类:其他好文   时间:2014-05-21 16:24:50    阅读次数:395
Mybatis分页插件2.0版本发布
v2.0更新内容: 1.支持Mybatis缓存,count和分页同时支持(二者同步) 2.修改拦截器签名,拦截Executor,签名如下: @Intercepts(@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})) 3.将Page类移到外面,方便调用...
分类:其他好文   时间:2014-05-21 14:40:56    阅读次数:408
LeetCode: Trapping Rain Water [041]
【题目】 Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For example, Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. The above elevation map is represente...
分类:移动开发   时间:2014-05-21 06:44:38    阅读次数:359
How to Restore File Error 3219 on Microsoft SQL Servers
File error 3219 occurs on Microsoft SQL servers where you are attempting to improperly restore a database with the "Restore Files and Filegroups" comm...
分类:数据库   时间:2014-05-21 03:36:02    阅读次数:427
日志-采集线程过多
mybatisconfigure:http://mybatis.github.io/mybatis-3/zh/configuration.htmlcorba接口问题:运行时间越久线程越多。原因:资源关闭方法错误。keyword:SelectorThread https://community.jboss.org/thread/49343?tstart=0解决:org.omg.CORBA调用 shutdown(false)后..
分类:编程语言   时间:2014-05-21 00:16:40    阅读次数:394
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