Lesson Review in .NET

Draw PDF-417 2d barcode in .NET Lesson Review

Lesson Review
PDF417 Creator In Visual Studio .NET
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Recognize PDF417 In Visual Studio .NET
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The following questions are intended to reinforce key information presented in this lesson. The questions are also available on the companion CD if you prefer to review them in electronic form.
Barcode Generation In Visual Studio .NET
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Decode Bar Code In Visual Studio .NET
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NOTE
PDF 417 Generator In C#
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PDF417 Encoder In Visual Studio .NET
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Answers
Encode PDF-417 2d Barcode In VB.NET
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Quick Response Code Creator In Visual Studio .NET
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Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of this book.
Creating Linear In .NET
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UPC Symbol Printer In Visual Studio .NET
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8
Make PDF417 In VS .NET
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USPS PLANET Barcode Drawer In .NET Framework
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Managing XML Data
Paint Bar Code In Java
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Printing PDF-417 2d Barcode In C#.NET
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1. You are developing a book-management application for your city s public library. You are required to store each book s index structure as XML data so that you can display the indexes to users in a Web page. You decide to store this information in a text column. Which of the following statements best justify this decision (Choose all that apply.) A. Preserves document order and structure B. Allows complex queries involving mixing relational and XML data C. Doesn t require node-level modifications or filtering D. Allows indexing for fast retrieval 2. XML schemas provide which functions (Choose all that apply.) A. Indexes to improve performance B. Validation constraints for the XML instance C. Data type information about the XML instance D. Methods to insert, delete, and update XML data
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Barcode Generator In Java
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Lesson 2: Retrieving XML Data by Using SQL Server Server-Side Technologies
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Barcode Generation In VS .NET
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Lesson 2: Retrieving XML Data by Using SQL Server Server-Side Technologies
Code 3 Of 9 Creation In None
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Encode Barcode In Java
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SQL Server 2005 offers multiple options for retrieving XML data. This lesson covers the various techniques for retrieving XML data from SQL Server 2005, regardless of whether the data is stored in a relational representation, as a textual column, or in an XML data type column. In this lesson, you will see how to use the FOR XML construct in Transact-SQL to retrieve relational data by using an XML representation. This lesson also covers the various methods implemented by the XML data type. Some of these methods are used to extract XML data stored as XML in an XML data type by executing an XQUERY or XPATH query instruction.
After this lesson, you will be able to:
Choose the proper FOR XML mode (RAW, AUTO, PATH, EXPLICIT), depending on the required result. Define nested queries to create complex multilevel XML documents. Extract XML fragments from the data contained inside an XML data type column, variable, or parameter. Transform existing XML fragments into new XML structures by using the XQUERY query language. Combine relational and XML structures into new result sets, and choose the proper representation either tabular format or XML format.
Estimated lesson time: 60 minutes
Converting Relational Data to XML
Both SQL Server 2000 and SQL Server 2005 enable you to compose relational data into an XML representation by using the FOR XML clause in the SELECT statement. SQL Server 2005 extends the FOR XML capabilities, making it easier to represent complex hierarchical structures, and adds new keywords to modify the resulting XML structure. The FOR XML clause converts the result sets from a query into an XML structure, and it provides different modes of formatting:
FOR XML RAW FOR XML AUTO FOR XML PATH FOR XML EXPLICIT
8
Managing XML Data
Let s look into the differences between them.
Using FOR XML RAW
The default behavior for the FOR XML RAW mode creates a new XML element identified as <row> for each row found in the result set. An XML attribute is added to the <row> element for each column in the SELECT statement, using the column name as the attribute name. To rename the <row> element, you can specify a new tag name right after the RAW keyword. To rename each attribute, you can specify an alias for each column. To change the formatting from attribute-centric to element-centric (create a new element for each column, instead of attributes), specify the ELEMENTS keyword after the FOR XML RAW clause. The following code example applies all these techniques. The query uses the HumanResources.Department and the HumanResources.EmployeeDepartmentHistory tables in the AdventureWorks sample database to list all the employees ordered by time in department, from the employee who has worked longest in each department to the department s most recently hired employee.
SELECT Department.[DepartmentID] ,History.[EmployeeID] ,History.[StartDate] ,Department.[Name] AS DepartmentName ,DATEDIFF(year, History.[StartDate], GetDate()) AS YearsToDate FROM HumanResources.Department, HumanResources.EmployeeDepartmentHistory History WHERE Department.DepartmentID = History.DepartmentID AND History.EndDate IS NULL ORDER BY Department.[DepartmentID], History.[StartDate] FOR XML RAW('OldestEmployeeByDepartment'), ELEMENTS
A partial result of executing this query is as follows:
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