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Pro T-SQL 2005 Programmer's Guide (Expert's Voice) by Michael Coles

By Michael Coles

T-SQL is the elemental language for database programming in SQL Server 2005. All specialist SQL Server clients want to know it and, much more very important, needs to know the way to exploit it good. The language has grown significantly due to the fact that SQL Server 2000 or even skilled T-SQL programmers have many new positive aspects to grasp. they wish a handy unmarried resource of data and suggestion. This booklet offers that, essentially and comprehensively. either database directors and builders will locate this hugely readable, special description of T-SQL an eye-opening and worthy reference for so long as they paintings with SQL Server 2005.

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T-SQL is the elemental language for database programming in SQL Server 2005. All specialist SQL Server clients want to know it and, much more very important, needs to know how to exploit it good. The language has grown significantly on account that SQL Server 2000 or even skilled T-SQL programmers have many new good points to grasp.

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All you have to do is describe what you want from SQL Server via a query and trust the database engine to deliver the correct result as efficiently as possible. To continue the cab driver analogy from earlier, in a declarative language you would tell the cab driver to take you to the airport and then trust that he knows the best route. The SQL equivalent of the C# code in Listing 1-1 might look something like Listing 1-2. Listing 1-2. Contact; ■Tip Unless otherwise specified, you can run all the T-SQL samples in this book in the AdventureWorks sample database using SQL Server Management Studio or SQLCMD.

Qxd 3/29/07 4:46 PM Page 35 CHAPTER 3 ■ T-SQL FOR SQL SERVER 2000 PROGRAMMERS Listing 3-1. WRITE clause: • The @offset parameter is a zero-based bigint and cannot be negative. The first character of the target string is at offset 0. • If @offset is NULL, the expression is appended to the end of the target string; @length is ignored in this case. WRITE expression after the target string is updated. @length is a bigint and cannot be negative. qxd 36 3/29/07 4:46 PM Page 36 CHAPTER 3 ■ T-SQL FOR SQL SERVER 2000 PROGRAMMERS Data Manipulation Language SQL Server 2005 includes several DML enhancements.

Qxd 3/29/07 4:50 PM Page 23 CHAPTER 2 ■ TOOLS OF THE TRADE Table 2-3. SQLCMD Commands Command Description :!! command The :!! command invokes the command shell. It executes the specified operating system command in the command shell. :CONNECT server [\instance] [-l timeout] [-U user [-P password] ] The :CONNECT command connects to a SQL Server instance. The server name (server) and instance name (\instance) are specified in the command. When :CONNECT is executed, the current connection is closed.

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