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What is a Statistic?
from:https://controls.engin.umich.edu/wiki/index.php/Basic_statistics:_mean,_median,_average,_standard_deviation,_z-scores,_and_p-value#Mean_and_Weigh...
分类:其他好文   时间:2015-10-15 12:46:00    阅读次数:205
使用DATABASE Log off收集oracle 等待事件信息
实例级别的监控,一直开启并且低开销:建立基础表:createtablesys.sesstat_historytablespaceEOLas SELECTc.username, c.osuser, a.sid, c.serial#, c.paddr, c.process, c.logon_time, a.statistic#, b.name, a.value, SYSDATEASlogoff_timestamp FROMv$sesstata,v$statnameb..
分类:数据库   时间:2015-09-17 17:45:59    阅读次数:215
mysql group by 分组查询
请看下表: 问题: 把统计时间(statistic)相同的,服务域(service_domain_moid)?a中的hd100的数量的和与hd100s的数量的和计算出来。 使用方法:?group by 首先,我们把service_domain_moid为a的筛选出来,如下:...
分类:数据库   时间:2015-09-16 11:00:34    阅读次数:256
Oracle Analyze 命令 详解
官网的链接如下:http://docs.oracle.com/cd/E11882_01/server.112/e26088/statements_4005.htm#SQLRF01105使用DBMS_STATS 收集统计信息参考:Oracle Statistic 统计信息 小结http://blog....
分类:数据库   时间:2015-09-10 01:44:08    阅读次数:429
ACdream 1213 Matrix Multiplication
Matrix Multiplication Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) Submit Statistic Next Problem Problem Description       Let us consider undirected...
分类:其他好文   时间:2015-08-28 00:54:46    阅读次数:187
ACdream 1420 High Speed Trains(容斥原理)
High Speed Trains Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) Submit Statistic Next Problem Problem Description       The kingdom of Flatland has n c...
分类:其他好文   时间:2015-08-26 17:56:23    阅读次数:141
ACdream 1213 Matrix Multiplication(矩阵相乘)
Matrix Multiplication Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) Submit Statistic Next Problem Problem Description       Let us consider undirected ...
分类:其他好文   时间:2015-08-26 12:15:52    阅读次数:136
ACdream 1216 Beautiful People(二维上升子序列 O(nlogn))
Beautiful People Special Judge Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) Submit Statistic Next Problem Problem Description       The most prestig...
分类:其他好文   时间:2015-08-26 01:57:41    阅读次数:196
ACdream 1420 High Speed Trains【Java大数高精度 + 递推】
High Speed Trains Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) Submit Statistic Next Problem Problem Description       The kingdom of Flatland has n c...
分类:编程语言   时间:2015-08-26 01:56:40    阅读次数:223
ACdream 1203 - KIDx's Triangle(解题报告)
KIDx's Triangle Time Limit: 2000/1000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others) Submit Statistic Next Problem Problem Description One day, KIDx solved a math problem for m...
分类:其他好文   时间:2015-08-15 23:05:58    阅读次数:191
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