Description
A number of schools are connected to a computer network. Agreements have been developed among those schools: each school maintains a list of schools to which it distributes software (th...
分类:
移动开发 时间:
2015-01-26 19:22:23
阅读次数:
214
备份[root@localhost bin]# ./mongodump -d my_mongodb connected to: 127.0.0.1 DATABASE: my_mongodb to dump/my_mongodb my_mongodb.system...
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数据库 时间:
2015-01-24 11:36:07
阅读次数:
208
模拟故障
cd /u01/oracle/oradata/orcl
删除所有的cqwr_TB文件
[oracle@txy orcl]$ rm -fr cqwr_TB_m* SQL> conn cqwr/cqwr
Connected.
SQL> select * from T_LTE_CARD_INFO...
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数据库 时间:
2015-01-23 14:36:59
阅读次数:
210
场景: 1、A call B 2、B answer 3、A connected with B共同的步骤: A 和 B 都需要初始化webrtc模块,创建peerconnectionfactory步骤1中A的状态 1、通过peerconnectionfactory创建peerconnecti...
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Web程序 时间:
2015-01-19 14:17:23
阅读次数:
273
Problem Description
During the War of Resistance Against Japan, tunnel warfare was carried out extensively in the vast areas of north China Plain. Generally speaking, villages connected by tunnels ...
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其他好文 时间:
2015-01-17 15:14:49
阅读次数:
259
用python编写socket程序,在指定端口上监听服务:importsocketsock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)port=8080sock.bind((‘‘,port))sock.listen(1)print‘listeningonport:%s‘%portwhileTrue:try:conn,addr=sock.accept()print‘connectedby%s:%s‘%(addr[0],add..
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其他好文 时间:
2015-01-16 17:04:29
阅读次数:
173
The Unique MSTTime Limit:1000MSMemory Limit:10000KTotal Submissions:21358Accepted:7560DescriptionGiven a connected undirected graph, tell if its minim...
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其他好文 时间:
2015-01-16 16:18:13
阅读次数:
172
1393 - HighwaysHackerland is a happy democratic country withm×ncities, arranged in a rectangularmbyngrid and connected bymroads in the east-west direc...
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其他好文 时间:
2015-01-15 23:41:15
阅读次数:
259
??
Associations
联合
An
association
is a structural relationship that specifies that objects of one thing are connected to objects of another. Given an association connecting two classes, yo...
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其他好文 时间:
2015-01-13 07:53:53
阅读次数:
139
EXPLAIN PLAN 和 AUTOTRACE 都可以查看执行计划。 值得一提的是:前者只是优化器通过读取数据字典的统计信息做出'最佳'访问路径判断,并没有真正去执行语句;后者是实际去执行了SQL语句,同时把访问记录数、执行计划、统计信息等打印出来。
下面粘出实验结果加以说明,注意对比两者的耗时:
SQL> CONNECT /AS SYSDBA
Connected.SQL> SET ...
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其他好文 时间:
2015-01-12 09:26:48
阅读次数:
135