background data modeling and unix linux

... Answer: 1:1 Husband and wife; taxi and driver; machine and operator; ship and dock M:1 Orders and items; auto and occupants; plane and passengers M:M Employees and skills; products and warehouses ... required for SQL command parsing D You should develop your own naming conventions and standards Overview of Data Modeling and Database Design 8Ć31 8Ć32 Introduction to Oracle: SQL and PL/SQL Using ... the system Overview of Data Modeling and Database Design 8Ć7 8Ć8 Introduction to Oracle: SQL and PL/SQL Using Procedure Builder Database Design Designing a relational database system involves...

Ngày tải lên: 10/12/2013, 17:15

... required for SQL command parsing D You should develop your own naming conventions and standards Overview of Data Modeling and Database Design 8Ć31 8Ć32 Introduction to Oracle: SQL and PL/SQL Using ... challenges through good database design, you improve the performance of your database Overview of Data Modeling and Database Design 8Ć5 8Ć6 Introduction to Oracle: SQL and PL/SQL Using Procedure ... the system Overview of Data Modeling and Database Design 8Ć7 8Ć8 Introduction to Oracle: SQL and PL/SQL Using Procedure Builder Database Design Designing a relational database system involves...

Ngày tải lên: 21/12/2013, 06:17

Ngày tải lên: 14/09/2015, 16:22

... social networking data is becoming more and more complex, heterogeneous and temporal, and it becomes more and more challenging to manage such data In the past decades, various database models have ... order to design a database model for storing and retrieving online social-network-related data Standard data models, query languages and access methods, such as the relational model and SQL, are often ... relational data model easier to develop database designs, and the focus shift towards modeling data as seen by the end users and applications rather than by the underlying implementation Relational DataBase...

Ngày tải lên: 04/10/2015, 10:24

... the UML Database The Database is the system for data storage and controlled access to stored data It is the biggest element a data model supports The relational database is the standard database ... oriented databases are supported by UML through modeling of persistent classes Data Modeling Profile for UML is not yet approved by OMG The UML and Data Modeling The possible representations of a Database ... columns and it can also exist on a single column Summary With the data modeling for UML profile, the UML fully supports data modeling needs It allows the support of software development and data modeling...

Ngày tải lên: 10/12/2013, 15:15

... 381 45 Summarizing Data with Database Statistical Functions 387 46 Filtering Data and Removing Duplicates 395 47 Consolidating Data ... to Random Variables 509 63 The Binomial, Hypergeometric, and Negative Binomial Random Variables 515 64 The Poisson and Exponential Random ... Prices and Asset Allocation Modeling 565 72 Fun and Games: Simulating Gambling and Sporting Event Probabilities 575 73 Using Resampling to Analyze Data...

Ngày tải lên: 23/03/2014, 04:20

... due to random input) 2.1.5 Comparing Linux and Unix This book uses the term Unix- like” to describe systems intentionally like Unix In particular, the term Unix- like” includes all major Unix variants ... systems, and the C programming language This book does include some information about the Linux and Unix programming model for security This book covers all Unix- like systems, including Linux and ... of The 43 Chapter Summary of Linux and Unix Security Features adventurous can check this in Linux by examining its Linux s source; in Linux 2.2.12, it’s file /usr/src /linux/ net/ipv4/af_inet.c ,...

Ngày tải lên: 24/03/2014, 04:20

... 10, 2008 Modeling with Data gsl_stats July 10, 2008 gsl_stats July 10, 2008 Modeling with Data Tools and Techniques for Scientic Computing Ben Klemens PRINCETON UNIVERSITY PRESS PRINCETON AND OXFORD ... with data sets: databases and a query language for organizing data Chapter presents a new syntax for talking to a database, Structured Query Language (SQL) You will nd that many types of data ... out bad data, join together data from multiple sources, and aggregate data into group means and sums C matrices are appropriate for ltering operations like those from earlier that took in data, ...

Ngày tải lên: 11/06/2014, 13:32

... 381 45 Summarizing Data with Database Statistical Functions 387 46 Filtering Data and Removing Duplicates 395 47 Consolidating Data ... to Random Variables 509 63 The Binomial, Hypergeometric, and Negative Binomial Random Variables 515 64 The Poisson and Exponential Random ... Prices and Asset Allocation Modeling 565 72 Fun and Games: Simulating Gambling and Sporting Event Probabilities 575 73 Using Resampling to Analyze Data...

Ngày tải lên: 12/08/2014, 12:21

... the Data tab on the ribbon In the Data Tools group, click What-If Analysis, and then click Data Table Now fill in the Data Table dialog box as shown in Figure 17-3 FIGURE 17-3  Creat ng a data ... shown in Figures 17-7 and 17-8 I chose to hide columns A and B and rows 16–18 To hide columns A and B, first select any cells in columns A and B (or select the column headings), and then display the ... SUMIFS, and AVERAGEIFS Functions,” and Chapter 45, “Summarizing Data with Database Statistical Functions.” The key to using the COUNTIF function (and similar functions) successfully is ­ nderstanding...

Ngày tải lên: 12/08/2014, 12:21

... subtotals and grand totals will have large data bars and also ­ make the other data bars smaller than they should be It’s better to have the data bars apply to all product sales, not the subtotals and ... each age group 366 Microsoft Excel 2010: Data Analysis and Business Modeling The data is included on the Data worksheet in the file Traveldata.xlsx, and a sample is shown in Figure 43-26 For ... lottery was random (Hint: Use the AVERAGE and MEDIAN functions to compute the mean and median lottery number for each month.) 348 Microsoft Excel 2010: Data Analysis and Business Modeling The...

Ngày tải lên: 12/08/2014, 12:21

... Excel 2010: Data Analysis and Business Modeling I know how to use the Data Analysis command to run a multiple regression Is there a way to run the regression without using this command and place ... Estimate the relationship between price and demand, and predict demand for a $46 price A percent increase in price will reduce demand by what percentage? Price Demand $30 00 300 $40 00 200 $50 00 110 ... the data in the Data worksheet in the file Auto.xlsx, shown in Figure 54-1 Sales are listed in thousands of cars, and GNP is in billions of dollars 453 454 Microsoft Excel 2010: Data Analysis and...

Ngày tải lên: 12/08/2014, 12:21

... percent and the standard error is reduced to 122 customers 506 Microsoft Excel 2010: Data Analysis and Business Modeling FIGURE 61-5  Forecast parameters and forecasts nc ud ng spr ng break and ... variance, and standard deviation of a random variable? In Chapter 42, “Summarizing Data by Using Descriptive Statistics,” I discussed the mean, variance, and standard deviation for a data set ... of the random variable, whereas the variance and standard deviation measure the spread of the random variable about its mean As an example of how to compute the mean, variance, and standard deviation...

Ngày tải lên: 12/08/2014, 12:21

... files and many other types of databases, such as Oracle and Teradata After copying data from Excel, you can select Paste to insert the data into PowerPivot To illustrate how to download data from ... stocks, bonds, and T-Bills Use the MMULT and TRANSPOSE functions to estimate Chapter 83  Array Formulas and Functions 663 (based on the given historical data) the variance and standard deviation ... emand curve (assuming a linear demand curve) as shown in Figure 80-1 (You can find this data and the chart on the No Blades worksheet in the file Razorsandblades.xlsx.) Two points on the demand...

Ngày tải lên: 12/08/2014, 12:21

... quietly and automatically from within a standard UNIX or Linux system Automation is already a core part of UNIX philosophy, and cron jobs have historically been the de facto method for automating UNIX ... about sharing data with NFS, rsync, , cfengine data copies, and Subversion Chapter 9, “Generating Reports and Analyzing Logs,” covers automated syslog and cfengine log analysis and reporting ... to set up your own UNIX- based environment This book isn’t like most UNIX/ Linux administration books, because it illustrates techniques and principles by building a real UNIX/ Linux environment...

Ngày tải lên: 13/08/2014, 04:21

... checks and fixes the ownership and permissions on , , and It also calculates and records the MD5 checksum of On any system in the class , the permissions on are checked because that is the standard ... SSH key to access your systems The actual data being sent is usually not important; it will typically contain commands to be executed and other control data If somebody later decrypts this traffic, ... accomplish the goal It is high-level enough that someone familiar with UNIX concepts and usage can read a cfengine configuration and understand what is being done without any prior cfengine knowledge The...

Ngày tải lên: 13/08/2014, 04:21

... command is executed to synchronize the system’s clock Cfengine terminates this command in 30 seconds if it has not completed On systems running Red Hat Linux, a script runs between 2:00 a.m and ... installed packages This command is placed in the background and cfengine does not wait for it to complete This way, cfengine can perform other tasks or exit while the command is still running You ... automated and fully functional UNIX infrastructure 77 CHAPT ER Bootstrapping a New Infrastructure H ow would you feel if you were offered the opportunity to install and configure all the systems and...

Ngày tải lên: 13/08/2014, 04:21

... Pre-Installation Script in the left-hand pane and leave the screen’s text box blank: Postinstallation Script Screen Select Post-Installation Script in the left-hand pane and paste in this small script ... FAI is a pleasure to work with The directory names and scripts are selfexplanatory, the class mechanism is intuitive and easy to work with, and the packages put useful starting configuration ... of the configuration such as the software group to install and the disk partition (slice) layout The format is easy to understand, and because we’re taking advantage of the sample configuration...

Ngày tải lên: 13/08/2014, 04:21

... ฀ ฀ and On Solaris, the files are and The and files map filesystem paths to files that contain the commands to mount a remote share at that path The and files have the actual mount commands ... infrastructure: a Cisco router at that handles routing, Network Address Translation (NAT), and DNS-caching services After we get DNS up and running on one or more of our UNIX systems, we’ll have cfengine ... successful results We had to modify only three included files ( , , and ), and create two new ones ( and ) Now we know the file locations and file contents that we need in order to host our private DNS...

Ngày tải lên: 13/08/2014, 04:21

... on both the remote and local systems to synchronize data between those systems Possible Uses of rsync You’ll find rsync very useful for synchronizing applications and their data You could, for ... the task and modify it to look like this: Note If you enabled SELinux on your Red Hat web-server systems, Apache will not work properly without SELinux modifications We not cover SELinux configuration ... other data- sharing options without this problem Sharing Data with NFS Network filesystems can be very convenient, but they can also give you headaches When the server is up and running and the...

Ngày tải lên: 13/08/2014, 04:21