A Chronological History of the Oracle of Omaha
oracle 字典翻译

oracle 字典翻译基本解释●Oracle:甲骨文,神谕,预言●/ˈɔːr.ə.kəl/●n. 神谕,预言●n. 甲骨文公司(Oracle Corporation)变化形式●复数形式:oracles具体用法●名词:o神谕,预言o同义词:prophecy, revelation, prediction, forecast, divinationo反义词:ignorance, uncertainty, doubt, skepticism, disbeliefo例句:●The oracle at Delphi was one of the most important oraclesin ancient Greece, where people traveled from afar to seekguidance from the gods. (德尔菲的神谕是古希腊最重要的神谕之一,人们从远方赶来寻求神的指引。
)●Many ancient cultures believed that oracles couldcommunicate directly with the divine, providing insights into the future. (许多古代文化相信神谕可以直接与神灵沟通,提供对未来的洞察。
)●The oracle's prediction was cryptic, leaving the king puzzledabout its true meaning. (神谕的预言晦涩难懂,让国王对其真正含义感到困惑。
)●In literature, an oracle often serves as a plot device toforeshadow events or reveal hidden truths. (在文学中,神谕常常作为情节装置来预示事件或揭示隐藏的真相。
甲骨文最早的英语作文

甲骨文最早的英语作文标题,The Discovery of Oracle Bone Inscriptions。
Oracle bone inscriptions, the earliest form of Chinese writing dating back to the Shang Dynasty (c. 1600–1046 BC), have long captured the fascination of historians, linguists, and archaeologists alike. The discovery of theseinscriptions has provided invaluable insights into the ancient Chinese civilization, shedding light on its language, culture, and societal practices.The journey of uncovering oracle bone inscriptions began in the late 19th century, with the accidental discovery of inscribed bones in the village of Xiaotun,near Anyang, in present-day Henan Province, China. It wasin 1899 that a local villager stumbled upon these peculiar bones while digging a well. Little did he know that his discovery would rewrite the history books.News of the finding quickly spread, attracting theattention of scholars and antiquarians. Among them was the renowned Chinese archaeologist Wang Yirong, who recognized the significance of the inscriptions and their potential to unlock the mysteries of ancient China. Wang Yirong meticulously studied the inscriptions, deciphering their meaning and unraveling the secrets they held.As word of the discovery spread, expeditions were launched to excavate the site and recover more oracle bones. Archaeologists painstakingly sifted through the earth, unearthing thousands of inscribed bones and fragments. Each discovery added to our understanding of the Shang Dynasty and its complex society.The inscriptions themselves were found on the shells of turtles and the shoulder blades of cattle, often accompanied by intricate pictograms and symbols. These inscriptions were not mere doodles but were purposefully carved into the bones, suggesting a sophisticated system of writing used for divination and communication with thespirit world.Through careful analysis, scholars were able todecipher the meaning of many of these inscriptions. They revealed details about royal lineages, religious rituals, astronomical events, and even everyday activities of the Shang people. It became clear that oracle bone inscriptions served as a window into the past, offering a glimpse intothe lives of those who lived over three millennia ago.One of the most remarkable aspects of oracle bone inscriptions is their connection to the modern Chinese writing system. Many of the characters found on the oracle bones are still in use today, a testament to the enduring legacy of the ancient Chinese civilization. This continuity of language and culture spanning thousands of years is a testament to the richness and resilience of Chinese history.The discovery of oracle bone inscriptions has had a profound impact on our understanding of ancient China. It has allowed us to reconstruct the past with greater clarity and precision, filling in the gaps left by millennia of time. Through the study of these inscriptions, we have gained a deeper appreciation for the achievements of ourancestors and the enduring legacy they have left behind.In conclusion, the discovery of oracle boneinscriptions represents a watershed moment in the study of ancient Chinese civilization. It has provided us with a window into the past, allowing us to glimpse the lives and beliefs of those who lived over three millennia ago. As we continue to unravel the secrets of the oracle bones, we are reminded of the rich tapestry of human history and the endless quest for knowledge that drives us forward.。
Oracle 9i 数据库性能调优技术-les02

Maintenance of the Alert Log File
• •
The alert log file consists of a chronological log of messages and errors. Check the alert log file regularly to:
2-21
Copyright © Oracle Corporation, 2002. All rights reserved.
Tuning Using Oracle Expert
2-14
Copyright © Oracle Corporation, 2002. All rights reserved.
Statspack
• • • • •
Installation of Statspack using the spcreate.sql script Collection of statistics execute statspack.snap Automatic collection of statistics using the spauto.sql script Produce a report using the spreport.sql script To collect timing information, set TIMED_STATISTICS = True
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Copyright © ll rights reserved.
Oracle Enterprise Manager Console
2-9
OracleDBA数据库结构试题及答案

OracleDBA数据库结构试题及答案Oracle DBA数据库结构精选试题及答案Q. 1 : Physical Disk Resources in an Oracle Database are1. Control Files2. Redo Log Files3. Data Files4. All of the above4Q. 2 : What is a Schema1. A Physical Organization of Objects in the Database2. A Logical Organization of Objects in the Database3. A Scheme Of Indexing4. None of the above2Q. 3 : An Oracle Instance is1. Oracle Memory Structures2. Oracle I/O Structures3. Oracle Background Processes4. All of the Above4Q. 4 : The SGA Consists of the Following Items1. Buffer Cache2. Shared Pool3. Redo Log Buffer4. All of the Above4Q. 5 : The area that stores the blocks recently used by SQL statements is called1. Shared Pool2. Buffer Cache3. PGA4. UGA2Q. 6 : Which of the following is not a Background Server Process in an Oracle Server1. DB Writer2. DB Reader3. Log Writer4. SMON2Q. 7 : Which of the following is a valid background server processes in Oracle1. ARCHiver2. LGWR ( Log Writer )3. DBWR ( Dbwriter )4. All of the above4Q. 8 : The process that writes the modified blocks to the data files is1. DBWR2. LGWR3. PMON4. SMON1 : Oracle does not modify the data in data file. Once the server process makes a change in the Memory, DBWR writes the modified blocks back to disk.Q. 9 : The process that records information about the changes made by all transactions that commit is1. DBWR2. SMON3. CKPT4. None of the above4 : LGWR process records the information about changes to databaseQ. 10 : Oracle does not consider a transaction committed until1. The Data is written back to the disk by DBWR2. The LGWR successfully writes the changes to redo3. PMON Process commits the process changes4. SMON Process Writes the data2Q. 11 : The process that performs internal operations like Tablespace Coalescing is1. PMON2. SMON3. DBWR4. ARCH2Q. 12 : The process that manages the connectivity of user sessions is1. PMON2. SMON3. SERV4. NET81Q. 13 : The ARCH process is enabled when the database runs in a1. PARALLEL Mode2. ARCHIVE LOG Mode3. NOARCHIVELOG Mode4. None of the above2Q. 14 : What performs the Check Point in the absence of a CKPT Process1. DBWR2. LGWR3. PMON4. SMON2 : At a check point dbwr writes all data to data files from memory. At this time the datafile headers have to be updated by LGWR in the absence of a CKPT processQ. 15 : If an application requests data that is already in the memory, it is referred to as a1. Cache Read2. Cache Hit3. Cache Miss4. Cache Latch2Q. 16 : If the data requested is in the memory but had to be reloaded due to aging, it is referred to as1. CACHE HIT2. CACHE REFRESH3. CACHE RELOAD4. None of the above3Q. 17 : If the data requested is not in the servers memory, it is referred to as1. CACHE DISK2. CACHE MISS3. CACHE READ4. None of the above2Q. 18 : You can Dynamically resize the following Parameters in the SGA1. Buffer Cache2. Library Cache3. Dictionary Cache4. None of the above4Q. 19 : The memory area that stores the parsed representation of most recently executed Statements is1. BUFFER CACHE2. LIBRARY CACHE3. DICTIONARY CACHE4. NONE OF THE ABOVE2Q. 20 : The Most recently used data dictionary information is stored in1. DATA DICTIONARY CACHE2. SHARED CACHE3. BUFFER CACHE4. NONE OF THE ABOVE1Q. 21 : The server memory that holds session-specific information is referred to as1. Program or Private Global Area2. Session Global Area3. Temp Space4. None of the above1Q. 22 : The area of memory used by the server as temporary area for sorting is called1. TEMP SPACE2. SORT AREA3. REDO BUFFER4. SORT BUFFER2Q. 23 : The fundamental unit of storage in a data file is1. BYTE2. BIT3. BLOCK4. None of the above3Q. 24 : The process that resolves the in-doubt transactions ina distributed environment is1. ARCH2. PROC3. RECO4. NONE OF THE ABOVE3Q. 25 : The size of each buffer in the database is set using this parameter1. DB_BLOCK_BUFFERS2. DB_BLOCK_SIZE3. DB_BYTE_SIZE4. NONE OF THE ABOVE2Q. 26 : The number of Block Buffers in the database is set in the init.ora using1. DB_BLOCK_SIZE2. DB_BLOCK_BUFFERS3. DB_BUFFER_CACHE4. NONE OF THE ABOVE2Q. 27 : The Parameter that sets the size of the shared SQL Area is1. SHARED_SQL_AREA2. SHARED_POOL_SIZE3. SHARED_CACHE_SIZE4. NONE OF THE ABOVE2。
英文简历样板 Resume samples

Resume WritingPutting Together a Solid ResumeBy Dawn Rosenberg McKay, Putting together a resume is very serious business. Often it is the first impression you will make on a prospective employer. Hopefully, after looking over your resume, the employer will grant you the opportunity to make a second impression.If we look at the job search as a marketing campaign, as was discussed in the article, Personal Marketing Strategy, we can then look at the resume as a print advertisement or a marketing brochure. If you take a look through a magazine you will see many ads. Try to find one that tells you to buy a product because the company needs to increase its profits. You will be hard pressed to find such a beast. The ads you see tell you what the manufacturer's product can do for you —make your smile bright, your hair shiny, or simply make your life better. When putting together your resume, evaluate the needs of the employer and then determine how you can fill those needs. If you have access to a computer (which you do if you are reading this article) and a quality printer, you can design a targeted resume for every job for which you apply. If you have to mass produce your resume, you will have to do a little guesswork to come up with one that will impress everyone.Choosing a Resume FormatNext you must determine what type of resume format to use. There are three basic types: chronological, functional, and a combination of the two. The following sections will explain what each of these types are and when to choose one type over another.Chronological ResumeThe chronological resume is probably the one with which most people are familiar. On it, work experience is listed in reverse chronological order (most recent job first). The period of time during which you were employed is listed first, followed by the name of the employer and then the employer's location. A description for each job is also included. Following work history is a section on education. If you are trying to show career growth, a chronological resume may be the way to go. If your most recent job is store manager, while the one before that is department manager, and the one before that is sales clerk, you can show a history of promotion. However, if your work history has been spotty or if it has been stagnant you shouldn't use a chronological resume. If you are changing careers, a chronological resume is not for you either.Functional ResumeA functional resume categorizes skills by function, emphasizing your abilities. This is useful if you are changing careers and want to show how you can transfer your skills. As stated previously, it is important to show prospective employers what you can offer them. A functional resume does just that. A functional job objective is given first, followed by several paragraphs, each discussing a different job function. Examples of functions are: Supervision and Management, Accounting, and Writing and Editing. Begin with the one you want to emphasize most. If you are customizing your resume for different employers, you can change your functional job objective as well as the order in which you list the functions. However, if you don't list your previous jobs, the personreviewing your resume may be suspicious.Combination ResumeA combination resume is exactly what it sounds like — it combines a functional resume with a chronological one. An objective is listed at the top, after your name and address, of course. Following that are paragraphs describing job functions. A section titled "Employment Experience" comes next. That is where the chronological part of the resume comes in. List employers and dates in this section. Do not offer further descriptions here as you have already described your abilities in the functional part of this resume. This is a useful format if you are changing careers but have a solid employment history. I also find it useful if your job duties on a single job were very diverse and you want to stress your various abilities. If you spent a long time at one job but moved up through the company, you might want to use a combination resume.Sample 1:Sanjay Dixit282 HSR Layout, Koramangala, Bangalore 560012, IndiaEmail:***********************Phone: 91-80-1234-5678EDUCATIONB.Tech. Computer Science and Engineering, Indian Institute of Technology, Chennai (2001-2005)Thesis Title: Efficient Algorithm for Terrain Simplification for Fast Rendering Advisor: Janaki RajagopalanSummary: Improves the state of the art in occlusion plane detection given terrain data. My implementation showed a user controlled drive-through of a complex scene with real-time rendering of 3 million polygons using a 16 node Beowulf cluster. A paper was published in Graphics Interface '04.St. Xavier's School, New Delhi (Graduated 2000)Ranked 1st in school in 12th C.B.S.E. Board Examination.PROJECT WORK (B. Tech)•Built an optimizing compiler for mC++, a C++ subset with support for dynamic object migration over the network between compatibletype-spaces.•Built a user-level distributed file system based on NFS withwrite-through caching, fault tolerance and consistency guarantees. WORK EXPERIENCE•Research Assistant, TIFR, Mumbai (Aug - Dec 2004): Implemented a library of image processing functions for edge detection andde-skewing on scanned images. Adapted an off-the-shelf OCR packageto operate on scanned mail images with 99% address recognitionaccuracy at the city/pin-code level and 85% at the street level.•Project Trainee, Kreativ Networks, Bangalore: (Jan 2005-present): Joined a 7 person startup implementing campus-widevideo-on-demand system for corporate training. Implemented thestreaming video component with buffering for jitter reduction. Also,bit-rate reduction in the event of congestion to meet frame-rateguarantees. Extensive performance testing was conducted. COMPUTER SKILLS•Software: SQL Server, Apache, CVS, Mathematica, Latex. Also,audio/video formats and codecs. Languages: C/C++, STL, Python,Javascript/C#•Platforms: Linux, FreeBSD, Windows 98, NT 4.0, 2000. PUBLICATIONSOcclusion Culling using Hyperplane Projection and Frequency Domain Splicing. Pavan Pleasant, Amit Ganguly, and Janaki Rajagopalan. Graphics Interface '01(2004) pp. 323-333.AWARDS•Best B.Tech thesis - 2004. Dept of Computer Science. IIT Chennai Silver Medalist at the International Mathematical Olympiad (IMO),2003. Seoul, S. Korea.•Ranked 18th in IIT Joint Entrance Examination - 2001. REFERENCES•Prof. R. K. Ravindranath, Dept. of Computer Science, IIT Chennai Prof.Janaki Rajagopalan, Dept. of Computer Science, IIT Chennai •Dr. B. Sanghal, TIFR, MumbaiSample 2:CURRICULUM � VITAECHETHAN.M.V Email:**************************.in#1255, 5th main, 2nd cross, Ph :( 0821) 2561192Vivekanandanagar, MysoreKarnataka � 570 023OBJECTIVESeeking full time career with an organization, which will permit me to use and contribute my abilities in software development and also to enhance my knowledge and contribute towards itsgrowth by committed and high quality work. My Motto in life is �Problems are opportunities and never accept defeat in life�.EDUCATIONBachelors Degree in COMPUTER SCIENCE AND ENGINEERINGPeople抯Education Society College of Engineering, MANDYA.Visveswaraiah Technological University.TECHNICAL SKILLSProgramming language C++, C, JavaRelational Database OracleOperating System Windows 95/95/2000, LinuxPROFILE SUMMARY:He is very exciting and full of energy, who can make atmosphere around him very vibrant. He is very determined and hardworking, who is much focused to achieve what he intends to. He is very friendly, open-minded and levelheaded person. He likes to work in a team. He can get along with the People nicely. He loves his family & friends, they are his motivation. He wants to be recognized.PROJECT DETAILS1.Implementation of Cryptography over NetworkingCryptography is the art of manipulating information into an intermediate form and hence secures it from getting it into wrong hands. In our application we have implemented network security using the famous and efficient ciphers BLOWFISH. An attractive user interface being given using GTK Glade tool. The application allows the user to either pass or receive messages across the network and these messages are made secure through the BLOWFISH cipher.Operating System: Linux � Red Hat version 7.0Language: CTeam Size: 42. Placement cell automationThe main aim of this database project is to fulfill need of having an efficient application to the placement cell Management, pertaining toward its needs .we have done this for our college placement cell.Front End: Visual Basic 6.0.Back End: Oracle 8.Platform : Windows 98.Team size: 2.3. Design and Development of VRRPVirtual Router Redundancy Protocol is designed to eliminate the single point of failure inherent in the static default routed Environment. It specifies an election protocol that dynamically assigns responsibility for a virtual router to one of the VRRP Routers on a LAN. Operating System: LinuxLanguage: CTeam Size: 4PERSONAL DETAILSDate of birth 10/12/1983Permanent address #1255,5th main, 2nd cross,Vivekanandanagar, MysoreKarnataka-570023Nationality IndianGender maleLanguages known English, Hindi, and KannadaSKILLS AND STRENGH�Excellent grasping capability and understanding the concepts clearly.�Ability to adjust to the situation.�Sense of Responsibility and a very hard worker.� A Self motivated team player, with excellent confidence & commitment.OTHER ACTIVITEIESI was an N.C.C. cadet in High School level. I am interested in playing cricket. I listen to music. I love traveling. I am deeply attracted by the Ideas and thoughts of Swami Vivekananda. DECLARARTIONI hereby declare that the information furnished above is true to the best of my knowledge.PLACE: Mysore (CHETHAN.M.V)Sample 3:Sample Engineering ResumeThis sample engineering resume will give you a quickstart on building an effective and optimized resume for your job application. Visitors can feel free to customize and edit our sample engineering resume as per their requirement for job application. We hope that our sample engineering resume will go a long way in portraying your abilities and skillsets efficiently.Sample 4:Sample Engineering ResumeThis sample engineering resume will give you a quick start on building an effective and optimized resume for your job application. Visitors can feel free to customize and edit our sample engineering resume as per their requirement for job application. We hope that our sample engineering resume will go a long way in portraying your abilities and skillsets efficiently.Sample 5:Sample Engineering ResumeThis sample engineering resume will give you a quickstart on building an effective and optimized resume for your job application. Visitors can feel free to customize and edit our sample engineering resume as per their requirement for job application. We hope that our sample engineering resume will go a long way in portraying your abilities and skillsets efficiently.Sample 6:Sample Engineering ResumeThis sample engineering resume will give you a quickstart on building an effective and optimized resume for your job application. Visitors can feel free to customize and edit our sample engineering resume as per their requirement for job application. We hope that our sample engineering resume will go a long way in portraying your abilities and skillsets efficiently.。
Oracle10g数据库选择题翻译+答案(1)

第3章创建数据库(1)后台进程跟踪文件的位置是CA.LOGFILE_DEST B.ORACLE_HOME C.BACKGROUND_DUMP_DEST D.CORE_DUMP_DEST (2)手动创建数据库的第一步是DA.启动实例B.启动SQL*Plus 以SYSDBA身份连接OracleC.查看系统的实例名D.创建参数文件(3)关于控制文件以下正确的是AA.Oracle建议至少二个控制文件存放在二个磁盘分区B.Oracle建议至少二个控制文件存放在一个磁盘分区C.Oracle建议存放一个控制文件D.一个控制文件不足以运行数据库(4)执行CREATE DA TABASE命令之前,应该发出的命令是B A.STARTUP INSTANCE B.STARTUP NOMOUNT C.STARTUP MOUNT D.以上都不是(5)创建数据库时,Oracle如何得知需要创建的控制文件信息?A A.从初始化参数文件B.从CREATE DATABASE 命令C.从环境变量D.从$ORACLE_HOME目录名为<db_name>.ctl的文件(6)哪个脚本文件创建数据字典视图?AA.catalog.sql B.catproc.sql C.sql.sql D.dictionary.sql (7)创建数据库时,DATAFILE子句能定义几个数据文件?D A.一个B.二个C.多个;仅一个属于系统表空间D.多个;都属于系统表空间(8)谁拥有数据字典?AA.SYS B.SYSTEM C.DBA D.ORACLE (9)在CREATE DA TABASE命令中,非法子句是BA.MAXLOGMEMBERS B.MAXLOGGROUPSC.MAXDATAFILES D.MAXLOGHISTORY (10)创建一个数据库至少需要几个控制文件?AA.一个B.二个C.三个D.无第5章物理存储结构(1)关于联机重做日志,以下哪两个说法是正确的?BCA.所有日志组的所有文件都是同样大小B.一组中的所有成员文件都是同样大小C.成员文件应置于不同的磁盘D.回滚段大小决定成员文件大小(2)DBA使用哪个命令显示当前归档状态?AA.ARCHIVE LOG LIST B.FROM ARCHIVE LOGSC.SELECT * FROM V$THREAD D.SELECT * FROM ARCHIVE_LOG_LIST (3)创建一个数据库需要多少个控制文件?AA.1 B.2 C.3 D.0(4)将下句补充完整:控制文件的建议配置是CA.每数据库一个控制文件B.每磁盘一个控制文件C.二个控制文件置于二个磁盘D.二个控制文件置于一个磁盘(5)当创建控制文件时,数据库必须处于什么状态?BA.加载B.未加载C.打开D.受限(6)哪个数据字典视图显示数据库处于归档状态?CA. V$INSTANCE B.V$LOG C.V$DATABASE D.V$THREAD(7)把多路镜像控制文件存于不同磁盘最大的好处是BA.数据库性能提高B.防止失败C.提高归档速度D.能并发访问提高控制文件的写入速度(8)哪个文件用于记录数据库的改变,并且用于实例的恢复?BA.Archive log file B.Redo log file C.Control file D.Alert log file(9)一个实例可以建立几个归档进程?CA.5 B.4 C.10 D.取决于操作系统(10)定义归档目标地址时,哪两个参数不能一起使用?AB ACA.LOG_ARCHIVE_DEST and LOG_ARCHIVE_DUPLEX_DESTB.LOG_ARCHIVE_DEST and LOG_ARCHIVE_DEST_1C.LOG_ARCHIVE_DEST and LOG_ARCHIVE_DEST_2D.以上都不是;可以指定所有的归档参数第6章逻辑存储结构(1)段的集合称为CA.区B.段C.表空间D.数据库(2)当数据库崩溃,何时使用回滚信息?CA.在崩溃之前B.恢复完成之后C.数据库重新打开之后、恢复之前D.数据库崩溃后回滚信息不被使用(3)数据字典表和视图存储在BA.USERS表空间B.SYSTEM表空间C.TEMPORARY表空间D.以上三个中任意(4)PCTFREE与PCTUSED之和不应超过AA.100 B.50 C.25 D.10(5)数据块的哪三个部分合称为块头部?CA.表目录、行目录和行数据B.标题、表目录、空闲区C.表目录、行目录、标题D.块头部、行数据、行头部(6)数据库打开时,以下哪个表空间必须联机?AA.SYSTEM B.TEMPORARY C.ROLLBACK D.USERS (7)指定哪个表空间参与排序操作,可以提高排序效率?B A.SYSEM B.TEMPORARY C.ROLLBACK D.USERS (8)临时表空间中用于排序的段是何时创建的AA.排序操作开始的时候B.临时表空间创建的时候C.当排序操作需要内存操过1KB的时候。
Oracle数据库试题100题(附答案)
Oracle数据库试题100题(附答案)1.当Oracle服务器启动时,下列哪种文件不是必须的(D)。
A.数据文件B.控制文件C.日志文件D.归档日志文件2.在Oracle中,当用户要执行SELECT语句时,下列哪个进程从磁盘获得用户需要的数据(B)。
A.用户进程B.服务器进程C.日志写入进程(LGWRD.检查点进程(CKPT)3.在Oracle中,一个用户拥有的所有数据库对象统称为(B)。
A.数据库B.模式C.表空间D.实例4.在Oracle中,有一个教师表teacher的结构如下:ID NUMBER(5)NAME V ARCHAR2(25)EMAIL VARCHAR2(50)下面哪个语句显示没有Email地址的教师姓名(C)。
A.SELECT name FROM teacher WHERE email = NULL;B.SELECT name FROM teacher WHERE email NULL;C.SELECT name FROM teacher WHERE email IS NULL;D.SELECT name FROM teacher WHERE email IS NOT NULL;5.在Oracle数据库的逻辑结构中有以下组件:A 表空间B 数据块C 区D 段这些组件从大到小依次是(B)。
A.A→B→C→DB.A→D→C→BC.A→C→B→DD.D→A→C→B6.在Windows操作系统中,Oracle的(A)服务监听并接受来自客户端应用程序的连接请求。
A.OracleHOME_NAMETNSListenerB.OracleServiceSIDC.OracleHOME_NAMEAgentD.OracleHOME_NAMEHTTPServer7.在Oracle 中创建用户时,若未提及DEFAULT TABLESPACE关键字,则Oracle 就将(B)表空间分配给用户作为默认表空间。
Oracle数据库由入门到进阶
Oracle9i Database Administrator's Guide
学习改变命运,知 识创造未来
Oracle数据库由入门到进阶
第2章 数据库的启动与关闭
查看参数设置的方法
Method
SHOW PARAMETERS
CREATE PFILE
Description
This SQL*Plus command displays the currently in use parameter values.
学习改变命运,知 识创造未来
Oracle数据库由入门到进阶
第3章 在数据库里安个家
❖ 给用户授权 SQL> grant connect, resource to myUser1;
❖ 登录后开始使用 SQL> connect myUser1/mypassword
学习改变命运,知 识创造未来
Oracle数据库由入门到进阶
第3章 在数据库里安个家
❖ 建立用户表 SQL> create table test ( book_ID number(8), book_title varchar2(80), author_name varchar2(8 char), publication_date date);
学习改变命运,知 识创造未来
Oracle数据库由入门到进阶
第4章 用户数据的基本维护
❖ SQL语句例子 SQL> insert into test values (1, ‘数理统计’, ‘贾乃光’, to_date(‘1993-08-08’,‘yyyy-mm-dd’));
SQL> commit;
学习改变命运,知 识创造未来
性能优化整合
Application design and programming Database configuration Adding a new application
Troubleshooting and tuning
1-4
Copyright © Oracle Corporation, 2001. All rights reserved.
• •
Why tune?
How much tuning?
1-3
Copyright © Oracle Corporation, 2001. All rights reserved.
Tuning Phases
Tuning can be divided into different phases:
• • • •
Backing up datafiles
Performing archiving
Block check numbers
Number of concurrent users and transactions
Copyright © Oracle Corporation, 2001. All rights reserved.
• • • •
Locate the bottleneck by using tools. Determine the reason for the bottleneck. Resolve the cause. Check that the bottleneck has been resolved.
1-10
Overview of Oracle 9i Performance Tuning
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oracle数据库题库
oracle数据库题库1)哪些DBMS的调度器过程可以⽤来启⽤程序?A. ENABLEB. ENABLE_PROGRAMC. VALIDATE_PROGRAMD. SET_ATTRIBUTEE. SET_ENABLED答案: A,D2)下列哪项不是⼀个有效的⽇程表语法元素?A. FREQB. BYHOURC. RUNDATED. INTERVALE. BYMINUTE答案:C3)哪个调度视图可以查询⽬前正在执⾏⼯作?A. DBA_SCHEDULER_JOB_RUN_DETAILSB. DBA_SCHEDULER_RUNNING_JOBS DBAC. DBA_SCHEDULER_CURRENT_JOBSD. DBA_SCHEDULER_JOBS DBAE. DBA_SCHEDULER_EXECUTING_JOBS答案: B,D4)⼀个作业或程序创建时,启⽤属性的默认值是什么?A. TRUEB. FALSEC. There is no default. It must be defined at creation time.D. PENDINGE. NULL5)全球化⽀持是通过Oracle特性中的哪⼀个提供的⽂本和字符处理功能实现?A. RSTLNEB. NLSRTLC. LISTENERD. NLSSORTE. Linguistic sorts答案: B6)以下哪种数据类型存储时区信息到数据库中?A. TIMESTAMPB. DATEC. TIMESTAMP WITH TIME ZONED. TIMESTAMP WITH LOCAL TIME ZONEE. DATETIME答案: C7)你要备份你的100 GB的数据库到⼀台远程磁带设备上。
当转移备份到磁带设备时您必须确保最低⽹络带宽消耗。
你的CPU 的当前消耗是⼤约40%。
你应该执⾏哪种类型的备份?A. standard backup setB. image copyC. compressed backupD. user-managed backup答案: C8)您⽤ASM存储管理Oracle数据库11g数据库。
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A Chronological History of the Oracle of OmahaA Chronological History of the Oracle of Omaha: 1930-1956∙August 30, 1930: Warren Edward Buffett is born to his parents, Howard and Leila Buffett, in Nebraska.∙1941: At eleven years old, Warren buys his first stock. He purchases 6 shares of Cities Service preferred stock [3 shares for himself, 3 for his sister, Doris], at a cost of $38 per share. The company falls to $27 but shortly climbs back to $40. Warren & Doris sell their stock. Almost immediately, it shoots up to over $200 per share.∙1943: Warren declares to a friend of the family that he will be a millionaire by the time he turns thirty, or "[I'll] jump off the tallest building in Omaha."∙1945: Warren is making $175 monthly delivering Washington Post newspapers. At fourteen years old, he invests $1,200 of his savings into 40 acres of farmland.∙1947: In his senior year of high school, Warren and a friend purchase a used pinball machine ata cost of $25.∙Buffett begins to think about the potential profit, and places it in a nearby Barber Shop. Within months, he owns three machines in three different locations. The business is sold later in theyear for $1,200 to a War Veteran.∙1947: Warren has earned over $5,000 delivering newspapers. His father presses him to attend college, a suggestion Warren does not take well. Nevertheless, that year, he enrolls as afreshman at the Wharton School of Finance and Commerce in Pennsylvania. Buffett hates it,complaining he knows more than the teachers.∙1949: Classmates return to find that Warren is no longer enrolled at Wharton. He has transferred to the University of Nebraska.∙1949: Warren is enrolled in classes, but has already begun his life. He is offered a job at J.C.Penny's after college, but turns it down. He graduates from college in only three years by takinghis last three credits over the summer. His savings have reached $9,800.∙1950: Buffett applies for admission to Harvard Business School and is turned down. He eventually enrolls at Columbia after learning that Ben Graham and David Dodd, two well-knownsecurity analysts, are professors.∙1951: Warren discovers Graham is on the Board of GEICO insurance. He takes a train to Washington, D.C., and knocks on the door of its headquarters until a janitor lets him in. Afterasking if anyone is working, he find a man on the sixth floor, who ends up being high up in thecompany. They talk for hours while Warren questions him on the business and insurance ingeneral. [Buffett now owns GEICO entirely].∙1951: Buffett graduates and wants to go to work on Wall Street. Both his father [Howard] and mentor [Graham] urge him not to. Warren offers to work for Ben Graham for free but Grahamrefuses.∙1951: Warren returns home and begins dating Susan Thompson.∙1951: Buffett purchases a Texaco station as a side investment. It doesn't work out as well as he hopes. Meanwhile, he is working as a stockbroker∙1951: Buffett takes a Dale Carnegie public speaking course. Using what he learnt, he began to teach a night class at the University of Nebraska, "Investment Principles". The students weretwice his age [he was only 21 at the time].∙April, 1952: Warren and Susie get married. They rent an apartment for $65 a month, and have their first child, also Susie.∙1954: Ben Graham calls Warren and offers him a job at his partnership. Buffett's starting salary is $12,000 a year.∙1956: Graham retires and folds up his partnership. Since leaving college six years earlier, Warren's personal savings have grown from $9,800 to over $140,000.∙1956: The Buffett family returns home to Omaha. On May 1, Warren created Buffett Associates, Ltd. Seven family members and friends put in a total of $105,000. Buffett himself invested only$100. He was now running his own partnership, and would never again work for anyone else.Over the course of the year, he opened two additional partnership, eventually bringing thenumber under his management to three. Years later, they would all be consolidated into one.A Chronological History of the Oracle of Omaha: 1957-1974∙1957: Buffett adds two more partnerships to his collection. He is now managing five investment partnerships from his home.∙1957: With Susan about to have her third child, Warren purchases a five-bedroom, stucco house on Farnam street. It cost $31,500.∙1958: The third year of the partnership completed, Buffett doubles the partner's money.∙1959: Warren is introduced to Charlie Munger, who will eventually become the Vice Chairman of Berkshire Hathaway, and an integral part of the company's success. The two get along immediately.∙1960: Warren asks one of his partners, a doctor, to find ten other doctors who will be willing to invest $10,000 each into his partnership. Eventually, eleven doctors agreed to invest.∙1961: With the partnerships now worth millions, Buffett made his first $1 million dollar investment in a windmill manufacturing company.∙1962: Buffett returns to New York with Susie for a few weeks to raise capital from his old acquaintances. During the trip, he picks up a few partners and several hundred thousanddollars.∙1962: The Buffett Partnership, which had begun with $105,000, was now worth $7.2 million.Warren and Susie personally own over $1 million of the assets. Buffett merges all of thepartnerships into one entity known simply as Buffett Partnerships, Ltd. The operations aremoved to Kiewit plaza, a functional but less-than-grand office, where they remain to this day.The minimum investment is raised from $25,000 to $100,000.∙1962: Buffett consults Munger on Dempster, the windmill manufacturing company. Munger recommends Harry Bottle to Warren; a move that would turn out to be very profitable. Bottle cutcosts, laid off workers, and caused the company to generate cash.∙1962: Warren discovers a textile manufacturing firm, Berkshire Hathaway, that is selling for under $8 per share. He begins to buy the stock.∙1963: Buffett sells Dempster for 3x the amount he invested [The almost worthless company had built a portfolio of stocks worth over $2 million alone during the time of Buffett's investment].∙1963: The Buffett partnerships becomes the largest shareholder of Berkshire Hathaway.∙1964: Due to a fraud scandal, American Express shares fall to $35. While the world is selling the stock, Buffett begins to buy shares en masse.∙1965: Warren's father, Howard, dies.∙1965: Buffett begins to purchase shares in Walt Disney Co. after meeting with Walt personally.Warren invested $4 million [which was equal to around 5% of the company].∙1965: The American Express shares which were purchased shortly before are selling for more than double the price Warren paid for the them.∙1965: Buffett arranges a business coup - taking control of Berkshire Hathaway at the board meeting and naming a new President, Ken Chace, to run the company.∙1966: Warren's personal investment in the partnership reaches $6,849,936.∙1967: Berkshire pays out its first and only dividend of 10 cents.∙1967: In October, Warren writes to his partners and tells them he finds no bargains in the roaring stock market of the '60s. His partnership is now worth $65 million.∙1967: Buffett is worth, personally, more than $10 million. He briefly considers leaving investing and pursuing other interests.∙1967: American Express hits over $180 per share, making the partnership $20 million in profit on a $13 million investment.∙1967: Berkshire Hathaway acquires National Indemnity insurance at Buffett's direction. It pays $8.6 million.∙1968: The Buffett Partnership earns more than $40 million, bringing the total value to $104 million.∙1969: Following his most successful year, Buffett closes the partnership and liquidates its assets to his partners. Among the assets paid out are shares of Berkshire Hathaway. Warren'spersonal stake now stands at $25 million. He is only 39 years old.∙1970: The Buffett Partnership is now completely dissolved and divested of its assets. Warren now owns 29% of the stock outstanding in Berkshire Hathaway. He names himself chairmanand begins writing the annual letter to shareholders.∙1970: Berkshire makes $45,000 from textile operations, and $4.7 million in insurance, banking, and investments. Warren's side investments are making more than the actual company itself.∙1971: Warren [at his wife's request], purchases a $150,000 summer home at Laguna Beach.∙1973: Stock prices begin to drop; Warren is euphoric. At his direction, Berkshire issues notes at 8%.∙1973: Berkshire begins to acquire stock in the Washington Post Company.∙1974: Due to falling stock prices, the value of Berkshire's stock portfolio began to fall. Warren's personal wealth was cut by over 50%.∙1974: The SEC opens a formal investigation into Warren Buffett and one of Berkshire's mergers.Nothing ever comes of it.PrevioA Chronological History of the Oracle of Omaha: 1977-1989∙1977: Berkshire indirectly purchases the Buffalo Evening News for $32.5 million. He would later be brought up on antitrust charges by a competing paper.∙1977: Susie leaves Warren, although not officially divorcing him. Warren is crushed.∙1978: Susie introduces Warren to Astrid, who eventually moves in with him.∙1979: Berkshire trades at $290 per share. Warren's personal fortune is approximately $140 million, but he was living solely on a salary of $50,000 per year.∙1979: Berkshire begins to acquire stock in ABC.∙1981: Munger and Buffett create the Berkshire Charitable Contribution plan, allowing each shareholder to donate some of the company's profits to his or her personal charities.∙1983: Berkshire ends the year with $1.3 billion in its corporate stock portfolio.∙1983: Berkshire begins the year at $775 per share, and ends at $1,310.∙Warren's personal net worth is $620 million. He makes the Forbes list for the first time.∙1983: Buffett purchases Nebraska Furniture Mart for $60 million. It turns out to be one of his best investments yet.∙1985: Buffett finally shuts down the Berkshire textile mills after years of sustaining it. He refuses to allow it to drain capital from shareholders.∙1985: Warren helps orchestrate the merger between ABC and Cap Cities. He is forced to leave the Board of the Washington Post [Federal legislation prohibited him sitting on the Boards ofboth Capital Cities and Kay Graham's Washington Post.∙1985: Buffett purchases Scott & Fetzer for Berkshire's collection of businesses. It costs around $315 million, and boasts such products as Kirby vacuums and the World Book Encyclopedia.∙1986: Berkshire breaks $3,000 per share.∙1987: In the immediate crash and aftermath of October, Berkshire loses 25% of its value, dropping from $4,230 per share to around $3,170. The day of the crash, Buffett loses $342million personally.∙1988: Buffett begins buying stock in Coca-Cola, eventually purchasing up to 7 percent of the company for $1.02 billion. It will turn out to be one of Berkshire's most lucrative investments.∙1989: Berkshire rises from $4,800 per share to over $8,000. Warren now has a personal fortune of $3.8 billion.。