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PHP中该怎样防止SQL注入?
因为用户的输入可能是这样的:?1value'); DROP TABLE table;-- 那么SQL查询将变成如下:?1INSERT INTO `table` (`column`) VALUES('value'); DROP TABLE table;--') 应该采取哪些有效的方法来防止SQ...
分类:数据库   时间:2015-01-03 19:44:52    阅读次数:231
python list函数
Python的字典的items(), keys(), values()都返回一个list >>>?dict?=?{?1?:?2,?‘a‘?:?‘b‘,?‘hello‘?:?‘world‘?} >>>?dict.values() [‘b‘,?2,?‘world‘] >>>?dict.keys() [‘a‘,?1,?‘hello‘] >>...
分类:编程语言   时间:2015-01-03 18:42:18    阅读次数:239
PostgreSQL中查找最大连续性字段
一、建表 lihao=#create table tb (id int,pid int,name varchar); lihao=#INSERT INTO tb VALUES (1, 0, ‘广东省‘); lihao=#INSERT INTO tb VALUES (2, 0, ‘浙江省‘); lihao=#INSERT INTO tb VALUES (3, 2, ‘衢州...
分类:数据库   时间:2015-01-03 17:28:39    阅读次数:254
C++一次指针问题和解决(char指针乱码)
问题始末struct NameGroup{ char* Name1; char* Name2;};NameGroup A(){ NameGroup result; //From other dll get values to NameGroup. //result.Na...
分类:编程语言   时间:2015-01-02 15:57:19    阅读次数:149
Leetcode:Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo...
分类:其他好文   时间:2015-01-02 15:50:42    阅读次数:124
[leetcode] Unique Binary Search Trees
题目:(DP)Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST...
分类:其他好文   时间:2015-01-02 06:24:14    阅读次数:195
jdbc mysql - Column count doesn't match value count at row 1.
该句的意思是,insert操作的SQL语句里列的数目和后面值的数目不一致.比如说,String sql = "insert into t_aqi(city_name, cur_date, aqi_val, no2_val, no2_val) values(?, ?, ?, ?)";这里很明显,t_a...
分类:数据库   时间:2015-01-02 06:23:39    阅读次数:220
[LeetCode]112.Path Sum
【题目】 Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example: Given the below binary tre...
分类:其他好文   时间:2015-01-01 23:49:22    阅读次数:189
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