Download Inside Microsoft SQL Server 2008; T-SQL Querying by Itzik Ben-Gan PDF

By Itzik Ben-Gan

Автор книги "SQL Server 2000 XML" подробно и во всех деталях описывает работу с базами данных SQL Server посредством XML документов. Изложение ведется "от простого к сложному", поэтому вначале издания рассматривается сам стандарт XML, затем уже описывается техника извлечения данных из базы с помощью средств FOR XML, обсуждаются возможности представления XML документов как реляционных наборов данных с помощью OPENXML. Автор уделяет внимание XDR и XSD схемам, мотивируя это как средство получения данных через HTTP запросы, использованию Xpath запросов к SQL Server, технологиям модификации баз данных через программы обновления. В книге рассматривается представление XML View в виде одного из средств описания таблиц СУБД. Описываются и практические задачи - демонстрируются техники импорта XML документов в базу данных с помощью программы массовой загрузки XML Bulk Load. Всего в издании five практических примеров, позволяющих убедиться в описанных в книге преимуществах использования XML технологий в работе с СУБД SQL Server 2000. Читатель найдет в издании преимущества и новые возможности релиза net 2.0, при использовании которого можно организовать XML доступ к базам данных SQL Server 2000.


Show description

Read or Download Inside Microsoft SQL Server 2008; T-SQL Querying PDF

Best .net books

Visual C++ Optimization with Assembly Code

Describing how the meeting language can be utilized to strengthen powerful C++ purposes, this consultant covers the advance of 32-bit functions for home windows. components of concentration contain optimizing high-level logical constructions, developing powerful mathematical algorithms, and dealing with strings and arrays.

Pro Flex on Spring (Expert's Voice in Web Development)

This can be the 1st booklet overlaying using the Spring Framework and integrating the Flex Framework in order that firm Java builders can now upload a wealthy net program entrance finish to their "back finish. "

Fast ASP.NET Websites

SummaryFast ASP. internet web pages grants simply what it promises—practical, hands-on counsel to create quicker, extra effective ASP. internet websites and purposes. This e-book deals step by step . NET-specific examples displaying you ways to use vintage web page optimization assistance, ASP. NET-specific suggestions, and how one can leverage new HTML5 gains.

Introducing .NET 4.5, 2nd Edition

Microsoft has brought quite a few alterations to the way in which that the . internet Framework operates. regular applied sciences have being altered, top practices changed, and developer methodologies adjusted. Many builders locate it difficult to maintain with the speed of switch throughout . NET's ever-widening array of applied sciences.

Additional info for Inside Microsoft SQL Server 2008; T-SQL Querying

Example text

This subphase performs a Cartesian product (a cross join, or an unrestricted join) between the two tables involved in the join and, as a result, generates virtual table VT1-J1. This table contains one row for every possible choice of a row from the left table and a row from the right table. If the left table contains n rows and the right table contains m rows, VT1-J1 will contain n×m rows. The columns in VT1-J1 are qualified (prefixed) with their source table names (or table aliases, if you specified them in the query).

Understanding this step is one of the most fundamental steps to correctly understanding SQL. When describing the contents of a table, most people (including me) routinely depict the rows in a certain order. However, a table represents a set (or multiset if duplicates exist), and a set has no order, so such depiction can cause some confusion by implying a certain order. Figure 1-2 shows an example for depicting the content of tables in a more correct way that doesn’t imply order. Customers (Customerid, city) (FRNDO, Madrid) (KRLOS, Madrid) (FISSA, Madrid) (MRPHS, Zion) Orders (orderid, customerid) (5, KRLOS) (3, KRLOS) (2, FRNDO) (4, KRLOS) (6, MRPHS) (7, NULL) (1, FRNDO) FIGURE 1-2 Customers and Orders sets Note Although SQL doesn’t assume any given order to a table’s rows, it does maintain ordinal positions for columns based on creation order.

PIVOT The PIVOT operator allows you to rotate, or pivot, data between columns and rows, performing aggregations along the way. OrderValues view in the InsideTSQL2008 sample database (see the book’s introduction for details on the sample database) and return the total value of orders handled by each employee for each order year. You want the output to have a row for each employee, a column for each order year, and the total value in the intersection of each employee and year. 54 Don’t get distracted by the subquery that generates the derived table OV.

Download PDF sample

Rated 4.84 of 5 – based on 35 votes
Category: Net