• Preprocessing DataPreprocessing Data

    In the real world of data-mining applications, more effort is expended preparing data than applying a prediction program to data. Data mining methods are quite capable of finding valuable patterns in data. It is straightforward to apply a method to data and then judge the value of its results based on the estimated predictive performance. This does...

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  • Introduction to knowledge discovery and data miningIntroduction to knowledge discovery and data mining

    Contents Preface Chapter 1. Overview of Knowledge Discovery and Data Mining 1.1 What is Knowledge Discovery and Data Mining? 1.2 The KDD Process 1.3 KDD and Related Fields 1.4 Data Mining Methods 1.5 Why is KDD Necessary? 1.6 KDD Applications 1.7 Challenges for KDD Chapter 2. Preprocessing Data 2.1 Data Quality 2.2 Data Transformations 2.3 Missing ...

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  • Migrating to SQL Server 2005 ExpressMigrating to SQL Server 2005 Express

    Launch the Windows Control Panel and then choose Administrative Tools➪ODBC. 2. In the ODBC Data Source Administrator dialog box, click either the User DSN or System DSN tab. Selecting the System DSN tab is generally a good idea; your data source is then visible to other users on your computer. 3. From the list of drivers, pick either the SQL Native...

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  • Đề tài Creating SQL Server 2005 Express ApplicationsĐề tài Creating SQL Server 2005 Express Applications

    Continuing, you now see a nested element known as Customer, whose start tag is <Customer> and end tag is </Customer>. This element itself contains two nested elements, one known as Name, and the other known as Identifier. It also contains a nested element known as Instructions. This element and those nested within it appear to be a litt...

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  • Full - Text searching and reporting servicesFull - Text searching and reporting services

    Now that you’re an expert on all of the moving parts found in SQL Server’s reporting architecture, it’s time to start putting them to work for you. To begin, I call out those important but somewhat tedious tasks that you need to take care of before you can get to the fun stuff: 1. Make sure that your computer has the complete reporting support infr...

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  • Putting the tools to work: Programming with SQL server 2005 expressPutting the tools to work: Programming with SQL server 2005 express

    Now that you have this information, you can take action if necessary: -- If there isn’t enough inventory, then order some more IF (@quantity_on_hand + @part_request_count > @minimum_number) INSERT INTO reorder VALUES (@part_number, @minimum_number) -- If it’s a white elephant, tell the buyer the good news IF @bad_item > 0 exec sqlexpress.msdb...

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  • Talking to a SQL ServerTalking to a SQL Server

    Naturally, you can write more complicated UPDATE statements. To do so, you often use the same advanced search syntax that you use in your SELECT statements. Before running any blanket, potentially widespread UPDATE statements, why not try them out as a SELECT statement first? You have nothing to lose by doing so, and you can also spot errors before...

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  • Adding and Accessing a SQL Server 2005 Express DatabaseAdding and Accessing a SQL Server 2005 Express Database

    To get the latest-and-greatest view of everything about your SQL Server 2005 Express instance, right-click anywhere on the Object Explorer tree and choose Refresh. The Query window The Query window is where you and SQL Server 2005 Express get to know each other, up close and personal. The workspace contains input windows (described as the Query Edi...

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  • Administering a SQL Server 2005 Express SystemAdministering a SQL Server 2005 Express System

    Fill in the values for all the relevant settings for your new user. There are five properties pages of information that you can provide: ã General: Here’s where you tell SQL Server 2005 Express the new login user’s name, choose a security method, and request a default database and language. ã Server Roles: Using this page, you can associate this ne...

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  • Tài liệu Lý thuyết cơ sở dữ liệuTài liệu Lý thuyết cơ sở dữ liệu

    CHƯƠNG I 3 TÌM BAO ĐÓNG CỦA TẬP THUỘC TÍNH 3 1. Định nghĩa bao đóng 3 2. Thuật toán tìm bao đóng của tập thuộc tính 3 Thuật toán 1 3 Bài tập áp dụng: 3 CHƯƠNG II 6 TÌM PHỦ TỐI THIỂU CỦA TẬP PHỤ THUỘC HÀM 6 Định nghĩa phụ thuộc hàm dư thừa: 6 Định nghĩa phủ tương đương: 6 Định nghĩa phủ tối thiểu: 6 Phương pháp tìm phủ tối thiểu: 6 Định nghĩa phụ t...

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