dbms_utility.get_cpu_time is a function return the time of cpu. Use it to create a function to calculate time you specified procedure or function real run.
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2013-01-04 14:59:32
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For WebGIS developmenet , I decide to study Java for a week.I want to know the best performance for WebGIS, and I will have a test on WebGIS platform.
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2006-06-09 23:34:00
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设计模式5——DAO(data access object)
1)把本机内存数据保存到指定目录中
2)把本机指定目录中数据读取到内存中设计模式4——装饰模式
1）加强某个类的功能，并把该类加到加强类的体系中设计模式3——值对象
1）数据封装。方便socket传输设计模式2——工厂
1)选择实现类
2)返回接口
3)隐藏实现类设计模式1——单例
1)仅仅同意内存中仅仅有一个实例
2)(多例)同意
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2017-08-02 21:56:00
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设计模式1——单例
解决：保证了一个类在内存中仅仅能有一个对象。
怎么做才干保证这个对象是唯一的呢？
思路：
1、假设其它程序可以任意用new创建该类对象，那么就无法控制个数。因此，不让其它程序用new创建该类的对象。
2、既然不让其它程序new该类对象，那么该类在自己内部就要创建一个对象，否则该类就永远无法创建对象了。
3、该类将创建的对象对外(整个系统)提供。让其它程序获取并使用。
步
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2017-05-18 14:56:00
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方法1:常规编辑方法，执行vi oldboy.txt进入vi编辑器（默认命令模式），点击a或i进入编辑模式，敲入内容i am studing linux，然后在键盘上esc健退出编辑模式（进入命令模式），最后敲：（必须要有：）wq保存并退出。wq解释为write quit方法2:echo‘i am study linux’ >oldboy.txt,使用echo>符号，如果oldboy.
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2017-07-22 01:47:14
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GraphProblem Description P. T. Tigris is a student currently studying graph theory. One day, when he was studying hard,
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2013-07-24 19:31:00
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网站流量统计(Studying Website Traffic Statistics)Analyzing as well as studying the actual web statistical data is an important task which you must do regularly to understand how your website is performing o
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2024-09-29 11:30:05
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生成函数 多项式 FWT 斯特林数 斯特林数习题 ←80% pass\leftarrow 80\%\ pass←80% pass 容斥习题 ←1% pass\leftarrow 1\%\ pass←1% pass Min-Max容斥 ←studying\leftarrow studying←studying 莫比乌斯反演习题 线性筛习题...
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2021-12-27 14:55:38
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TutorTime Limit: 2000/1000 MS (Java/Others)Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 47Accepted Submission(s): 26Problem DescriptionLilin was a student of Tonghua Normal University. She is studying at University of Chicago now. Besides studying, she worked as a tutor teaching Chi
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2013-08-24 18:30:00
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P. T. Tigris is a student currently studying graph theory. One day, when he was studying hard, GS appeared around the corner shyly and came up with a problem: Given a graph with n nodes and m undirected weighted edges, every node having one of two colors, namely black (denoted as 0) and white (deno.
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2013-07-23 19:01:00
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Recently I am studying Angular in my spare time. And I
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2022-04-14 14:13:50
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1. 为oldboy.txt增加内容为“I am studying linux.”。 解答： 方法一：#vim /data/oldboy.txt I am studying linux.方法二：# echo "hello oldboy linux" >>/
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2017-05-12 18:06:14
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题干：Recently, Mike was very busy with studying for exams and contests. Now he is going to chill a
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2022-06-15 13:17:46
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Paper：《All Models are Wrong, but Many are Useful: Learning a Variable’s Importance by Studying an Entire Class of Pre
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2022-12-14 00:36:27
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题目：At the school where Vasya is studying, preparations are underway for the graduation ceremony. One of the planne
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2022-11-07 15:46:20
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http://www.elijahqi.win/archives/1603 Recently, Mike was very busy with studying for exams and
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2022-08-08 13:25:57
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All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to ...
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2015-08-30 19:26:00
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All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to
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2018-11-12 10:59:00
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All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to ...
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2021-08-07 14:02:26
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http://www.elijahqi.win/archives/2942 As behooves any intelligent schoolboy, Kevin Sun is studying psycowlogy, cowculus, a
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2022-08-08 14:18:09
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