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mongodb数据库设计原则
1.一对很少one-to-few可以采用内嵌文档person集合中{name:'张三',age:20,address:[{country:"中国",province:"山西省",city:"长治市"},{country:"中国",province:"山西省",city:"太原市"}]}优点:不需要单...
分类:数据库   时间:2015-10-09 11:57:43    阅读次数:255
宿迁用户去往外地分析
数据抽取 将几张表中的数据放到一张表中 ????select?s_cycle_date?as?f_date,roam_prov_id,mdn,mdn_city_id?into?tmp_qgj_sqmy?from?mpm00005?where?roam_prov_id<>1?and?mdn_city_id=9 ???i...
分类:其他好文   时间:2015-10-08 23:19:30    阅读次数:379
将 excel文件数据导入MySQL数据库中
第一步:先将Excel文件另存为文本文件(制表符分割)第二步:将生成的txt文件另存,并修改编码格式utf8;第三步:将文件放到指定位置,或自己想要的位置:G:\city.txt第四步:避免创建数据库及表出现中文乱码和查看编码方法:1、创建数据库的时候:CREATE DATABASE `test.....
分类:数据库   时间:2015-10-07 15:58:28    阅读次数:245
Fire net
Fire NetTime Limit:2 Seconds Memory Limit:65536 KBSuppose that we have a square city with straight streets. A map of a city is a square board with n r...
分类:Web程序   时间:2015-10-07 14:38:24    阅读次数:208
[Training Video - 4] [Groovy] Constructors in groovy, this keyword
Bank.log = logBank b1 = new Bank()b1.name = "BOA"b1.minbalance = 100b1.city="London"Bank b2 = new Bank()b2.name = "HSBC"b2.minbalance = 100b2.city="LA...
分类:其他好文   时间:2015-10-06 20:43:12    阅读次数:139
杭电4496--D-City(***并查集***)
D-CityTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 2649Accepted Submission(s): 922Problem Descr...
分类:其他好文   时间:2015-10-06 16:54:03    阅读次数:474
【UVa 208】Firetruck
The Center City ?re department collaborates with the transportation department to maintain mapsof the city which re?ects the current status of the cit...
分类:其他好文   时间:2015-10-05 18:18:38    阅读次数:246
(中等) CF 576D Flights for Regular Customers (#319 Div1 D题),矩阵快速幂。
In the country there are exactlyncities numbered with positive integers from1ton. In each city there is an airport is located.Also, there is the onl.....
分类:其他好文   时间:2015-10-05 00:45:45    阅读次数:256
hihoCoder#1094
刚开始学习C语言,准备在做hiho的题目的过程中来学习,在此进行记录,如果代码中有错误或者不当的地方还请指正。时间限制:10000ms单点时限:1000ms内存限制:256MB描述Little Hi gets lost in the city. He does not know where he i...
分类:其他好文   时间:2015-10-02 22:21:50    阅读次数:257
for-in用法
var nyc = { fullName: "New York City", mayor: "Bill de Blasio", population: 8000000, boroughs: 5};for(var i in nyc){ console.log(i);}输出://输出的是属性var ny...
分类:其他好文   时间:2015-09-29 16:50:52    阅读次数:117
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