在一个项目中,需要查询表tr_product中的user_id字段,如果user_id相同,则把其对应的money字段相加,数据库截图如下:实现代码:$Model = D('Model');$res =$Model->query("SELECT user_id,sum(money) from tr_...
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Web程序 时间:
2014-07-12 13:11:17
阅读次数:
287
SELECT最终要展现的列,旧表的列也行,PIVOT表的别名.列名(在下方IN里面) as 别名也行FROM 表 PIVOT( SUM(要统计的值,在新表中每行出现一次,出现在归属于in里[]的某列下面,其余为null) FOR [旧表的列,新表中以此列下面行的值为列名,列名在IN里面以[]列...
分类:
数据库 时间:
2014-07-12 00:24:56
阅读次数:
250
Given two numbers represented as strings, return multiplication of the numbers as a string.Note: The numbers can be arbitrarily large and are non-nega...
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其他好文 时间:
2014-07-12 00:15:07
阅读次数:
268
Given two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100"class Solution {public: string addBinary(stri...
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其他好文 时间:
2014-07-11 20:05:47
阅读次数:
224
时间限制:0.75s空间限制:6M题意 n*n(n>1; r同理,即rint n, sum, max, k, m;void dfs (int line , int row, int l, int r, int k) { int pos, p, i; if (line > n){ ...
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其他好文 时间:
2014-07-11 17:59:56
阅读次数:
358
题目:Given two sorted integer arrays A and B, merge B into A as one sorted array.Note:You may assume that A has enough space (size that is greater or eq...
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其他好文 时间:
2014-07-10 14:41:23
阅读次数:
177
(1)方法一,背包问题解法 1 #include 2 using namespace std; 3 #include 4 #include 5 6 //采用背包问题方法,从后向前,最后一个放和不放背包里,注意递归退出条件和sum==n后,没有return而是继续 7 vector a; ...
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其他好文 时间:
2014-07-10 14:32:24
阅读次数:
130
Sum It Up
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 3695 Accepted Submission(s): 1873
Problem Description
Given a specifie...
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其他好文 时间:
2014-07-09 12:25:10
阅读次数:
191
Power Strings
Time Limit: 3000MS
Memory Limit: 65536K
Total Submissions: 31111
Accepted: 12982
Description
Given two strings a and b we define a*b to be their concate...
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其他好文 时间:
2014-07-09 11:11:53
阅读次数:
155
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 tree ...
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其他好文 时间:
2014-07-09 10:32:42
阅读次数:
151