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sqlzoo转
http://m.blog.csdn.net/article/details?id=50504578 SELECT within SELECT Tutorial 6.Which countries have a GDP greater than every country in Europe? [G ...
分类:数据库   时间:2016-09-05 23:38:51    阅读次数:520
xpath语法学习笔记-09052016
<?xmlversion="1.0"encoding="ISO-8859-1"?><catalog> <cd country="USA"> <title>EmpireBurlesque</title> <artist>BobDylan</artist> <price>10.90</price> </ ...
分类:其他好文   时间:2016-09-05 19:00:13    阅读次数:115
Code Forces Gym 100971D Laying Cables(单调栈)
D - Laying Cables Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u One-dimensional country has n cities, the i-th of which is loc ...
分类:其他好文   时间:2016-09-03 22:28:33    阅读次数:303
Electronic Auction
Electronic Auction Time limit: 0.5 secondMemory limit: 64 MB There is a deficit in cast-iron pigs in the country. They are sold at an electronic aucti ...
分类:其他好文   时间:2016-09-01 19:59:09    阅读次数:165
POJ 2864 Pascal Library
题目链接: http://poj.org/problem?id=2864 Pascal Library Description Pascal University, one of the oldest in the country, needs to renovate its Library Bui ...
分类:其他好文   时间:2016-08-31 13:44:38    阅读次数:313
NBUT 1635 Explosion(最小顶点覆盖)
[1635] Explosion 时间限制: 10000 ms 内存限制: 65535 K 问题描述 there is a country which contains n cities connected by n - 1 roads(just like a tree). If you place ...
分类:其他好文   时间:2016-08-28 16:24:44    阅读次数:219
[codeforces 241]A. Old Peykan
[codeforces 241]A. Old Peykan 试题描述 There are n cities in the country where the Old Peykan lives. These cities are located on a straight line, we'll de ...
分类:其他好文   时间:2016-08-28 13:42:16    阅读次数:131
python之数据库操作
1.插入数据importMySQLdb#创建连接conn=MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘123456‘,db=‘test‘)cur=conn.cursor()#execute执行,%s形式是为了防止sql注入reCount=cur.execute(‘insertINTOtest1(name,country,age,address)VALUES(%s,%s,%s,%s,%s)‘,(‘2‘,‘jer..
分类:数据库   时间:2016-08-27 23:35:32    阅读次数:234
python之数据库操作
1.插入数据importMySQLdb#创建连接conn=MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘123456‘,db=‘test‘)cur=conn.cursor()#execute执行,%s形式是为了防止sql注入reCount=cur.execute(‘insertINTOtest1(name,country,age,address)VALUES(%s,%s,%s,%s,%s)‘,(‘2‘,‘jer..
分类:数据库   时间:2016-08-27 23:34:54    阅读次数:257
sqlzoo.net刷题2
Find the largest country (by area) in each continent, show the continent, thename and the area: 找到每个洲面积最大的国家: 其实这种>=ALL(子查询) 最不好理解,因为SQL不是一门过程化语言,所以用起 ...
分类:数据库   时间:2016-08-27 19:22:21    阅读次数:360
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