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数据库优化方面的经验
用PreparedStatement 一般来说比Statement 性能高:一个sql 发给服务器去执行,涉及步骤:语法检查、语义分析, 编译,缓存“inert into user values(1,1,1)”-􀃆二进制“inert into user values(2,2,2)”-􀃆二进制“i...
分类:数据库   时间:2014-07-09 22:53:27    阅读次数:361
ahjesus code simith 存储过程模板
CREATE PROCEDURE ASSET NOCOUNT ONSET @ = NEWID()INSERT INTO [] ( [], ) VALUES ( @, )SET @ = SCOPE_IDENTITY()CREATE PROCEDU...
分类:其他好文   时间:2014-07-09 18:49:42    阅读次数:257
整形提升(c语言基础)
When you use an arithmetic operator, the operands go through two conversions.Integer promotions: If int can represent all values of the type, then the...
分类:编程语言   时间:2014-07-09 13:46:00    阅读次数:278
poj 1001 Exponentiation
Exponentiation Time Limit: 500MS   Memory Limit: 10000K Total Submissions: 133146   Accepted: 32525 Description Problems involving the computation of exact values of very...
分类:其他好文   时间:2014-07-08 20:36:13    阅读次数:187
java.sql.SQLException:Column count doesn't match value count at row 1
1、错误描述 java.sql.SQLException:Column count doesn't match value count at row 1 2、错误原因     在插入数据时,插入的字段个数跟数据库表字段个数不一致 insert into student(sno,sname,sage,ssex) values(1,'张三丰','man'); 3、解决办...
分类:数据库   时间:2014-07-08 20:14:16    阅读次数:286
LeetCode:: Unique Binary Search Trees[详细分析]
Unique Binary Search Trees  My Submissions Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example, Given n = 3, there are a total of 5 uniqu...
分类:其他好文   时间:2014-07-08 14:18:39    阅读次数:159
Calculate the values of counters
TaskdescriptionYouaregivenNcounters,initiallysetto0,andyouhavetwopossibleoperationsonthem:increase(X)counterXisincreasedby1,maxcounterallcountersaresettothemaximumvalueofanycounter.Anon-emptyzero-indexedarrayAofMintegersisgiven.Thisarrayrepresentsconsecutiv..
分类:其他好文   时间:2014-07-08 09:40:50    阅读次数:150
事务处理
/************事务处理*****************/public static void main(String[] args) {String sql1 = "insert into stuInfo values(123910,'小建',23,'男','普宁')";String ...
分类:其他好文   时间:2014-07-06 16:45:37    阅读次数:168
用python查找在指定目录下特定文件夹下的指定文件
本代码是在python2.*上边所写。 功能:在指定目录下查找特定文件夹下的特定文件。 实例:查找在packages目录下文件夹名为values下的strings.xml文件 #!/usr/bin/env python import os def walk_dir(path): filter_file_name = 'strings.xml' for root...
分类:编程语言   时间:2014-07-06 10:48:18    阅读次数:202
Gray Code
The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-negative integer n representing the total number of bits in the code, print the sequence of...
分类:其他好文   时间:2014-07-04 07:35:58    阅读次数:215
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