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YII 数据库相关操作
CDbConnection:  一个抽象数据库连接 CDbCommand:     SQL statement CDbDataReader:  匹配结果集的一行记录 CDbTransaction:数据库事务 访问数据库前需要建立数据库连接;使用DAO建立一个抽象数据库链接: $connection = new CDbConnection($dsn, $username, $passw...
分类:数据库   时间:2015-04-12 22:46:35    阅读次数:266
TC TCO2015R1A(Similars-状态压缩)
Problem Statement   Given two positive integers x and y, their similarity S(x, y) is defined as follows: To compute S(x, y) we count all d between 0 and 9, inclusive, such that both x and y...
分类:其他好文   时间:2015-04-12 16:16:23    阅读次数:119
【LeetCode】Valid Number 解题报告
【题目】 Validate if a given string is numeric. Some examples: "0" => true " 0.1 " => true "abc" => false "1 a" => false "2e10" => true Note: It is intended for the problem statement to ...
分类:其他好文   时间:2015-04-10 18:09:25    阅读次数:117
SQL SERVER 2005删除维护作业报错:The DELETE statement conflicted with the REFERENCE constraint "FK_subplan_jo
下面是网上找的一些资料来解决这个问题: 先获取这个job_id: USE [msdb] GO /****** Object: Job [dbbackup_diff.Subplan_1] Script Date: 04/08/2015 10:22:46 ******/ EXEC msdb.dbo.sp_delete_job @job_id=N'588acfb8-630b-41c3-aa47...
分类:数据库   时间:2015-04-08 13:21:44    阅读次数:236
Leetcode Rising Temperature
题目地址:https://leetcode.com/problems/rising-temperature/题目解答:# Write your MySQL query statement belowselect w1.Id from Weather w1 inner joinWeather w2 o...
分类:其他好文   时间:2015-04-08 12:35:18    阅读次数:113
The Design of HDFS
HDFS is a filesystem designed for storing very large files with streaming data access patterns, running on clusters of commodity hardware. Let’s examine this statement?in more detail:? Very lar...
分类:其他好文   时间:2015-04-08 06:49:45    阅读次数:128
OpenSCAD中使用include或use引入外部库
一、OpenSCAD 使用include或use引入外部库 ????本文英文版本参考:https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Include_Statement ????===========================...
分类:其他好文   时间:2015-04-07 12:18:15    阅读次数:145
MySQL的简单操作方法:Statement、PreparedStatement
(1)连接mysql的工具类:DBUtil.javapackage com.xuliugen.util;import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException...
分类:数据库   时间:2015-04-05 21:57:36    阅读次数:206
JAVA学习笔记(五十一)- DBUtil 封装数据库工具类
数据库工具类import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement;/* * 数据库工具类 */ public class DBUtil { // 获取数据库连接...
分类:数据库   时间:2015-04-05 09:09:22    阅读次数:268
mysql事务的四大特性与简单运用
package mysql;import java.sql.Connection;import java.sql.SQLException;import java.sql.Savepoint;import java.sql.Statement;import org.junit.Test;//事物特性...
分类:数据库   时间:2015-04-04 21:04:35    阅读次数:375
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