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The raw data is like timestamp, router, interface, src_ip, dst_ip, protocol, pkts 10000000, 1.1.1.1 1 2.2.2.2 1.3.3.3 tcp 100 10000000, 1.1.1.2 2 2.2.8.2 2.3.3.3 tcp 200 10000001, 8.1.1.1 1 2.2.2.8 3.3.3.3 udp 500 10000001, 2.1.1.1 1 2.2.8.2 4.3.3.8…
I have been suffering from infamous hibernate exception org.hibernate.LazyInitializationException: could not initialize proxy - no Session Now the community is cheering over <property name="hibernate.enable_lazy_load_no_trans" value="tru…
大家好 上周写了匿名方法一文,很多读者,很高兴,相信我们已经从大伙的回复中,对.NET又有了更深刻的认识. 好,现在说主题,各类数据库都有相应更新本表top n的方案.现在我一一举例 首先看表结构如下: 数据库以及表创建命令初始化数据库语句 CREATE TABLE student( id ) NOT NULL, name ) NULL, age int NULL) ); ); ); ); ); ); ); ); ); ); 表格结构如下: ID Name Age 001 wfg 20 002…
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang=&…
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转自:http://apfelmus.nfshost.com/articles/monoid-fingertree.html This post grew out of the big monoid discussion on the haskell-cafe mailing list. Introduction A very powerful application of monoids are 2-3 finger trees, first described by Ralf Hinze a…
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