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...
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数据库 时间:
2014-07-09 22:53:27
阅读次数:
361
CREATE PROCEDURE ASSET NOCOUNT ONSET @ = NEWID()INSERT INTO [] ( [], ) VALUES ( @, )SET @ = SCOPE_IDENTITY()CREATE PROCEDU...
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其他好文 时间:
2014-07-09 18:49:42
阅读次数:
257
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...
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编程语言 时间:
2014-07-09 13:46:00
阅读次数:
278
Exponentiation
Time Limit: 500MS
Memory Limit: 10000K
Total Submissions: 133146
Accepted: 32525
Description
Problems involving the computation of exact values of very...
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其他好文 时间:
2014-07-08 20:36:13
阅读次数:
187
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...
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数据库 时间:
2014-07-08 20:14:16
阅读次数:
286
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...
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其他好文 时间:
2014-07-08 14:18:39
阅读次数:
159
TaskdescriptionYouaregivenNcounters,initiallysetto0,andyouhavetwopossibleoperationsonthem:increase(X)counterXisincreasedby1,maxcounterallcountersaresettothemaximumvalueofanycounter.Anon-emptyzero-indexedarrayAofMintegersisgiven.Thisarrayrepresentsconsecutiv..
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其他好文 时间:
2014-07-08 09:40:50
阅读次数:
150
/************事务处理*****************/public static void main(String[] args) {String sql1 = "insert into stuInfo values(123910,'小建',23,'男','普宁')";String ...
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其他好文 时间:
2014-07-06 16:45:37
阅读次数:
168
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...
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编程语言 时间:
2014-07-06 10:48:18
阅读次数:
202
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...
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其他好文 时间:
2014-07-04 07:35:58
阅读次数:
215