Download e-book for iPad: Advanced Transact-SQL for SQL Server 2000 by Itzik Ben-Gan
By Itzik Ben-Gan
This publication explores the strong features of T-SQL and enables you to take advantage of them to the max. The e-book tackles complex components in T-SQL similar to joins, subqueries, shops systems, triggers, user-defined capabilities, listed perspectives, cascading activities, federated perspectives, hierarchial buildings and extra. The e-book indicates strategies to universal difficulties either in SQL server 2000 and in prior types. certain emphasis is put on practicular difficulties within the and on writing effective and good appearing code. The booklet doesn't cease at ANSI-92 SQL but in addition represents good points which are specific to SQL Server, particularly SQL Server 2000. that will help you on your trip, the publication presents many puzzles (and pay attention, those aren't uncomplicated ones) and proposed solutions.About the authors:Itzik Ben-Gan is a senior SQL Server teacher and advisor with ten years of expertise in networking, improvement, databases and knowledge warehousing. he's a well-liked columnist and contributing editor for SQL Server journal, and is a Microsoft SQL Server MVP.Dr. Tom Moreau is President of Brockman Moreau Consulting, Inc. with greater than 16 years event in details know-how. Moreau has been utilizing SQL Server considering the fact that 1993. He writes frequently for Pinnacle's Microsoft SQL Server specialist publication.
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Additional info for Advanced Transact-SQL for SQL Server 2000
Table 'Orders'. Scan count 1, logical reads 3, physical reads 0, read−ahead reads 0. Listing 1−45 shows the SHOWPLAN output. [OrderID]) ORDERED FORWARD) You can revise this query so that it uses a completely qualified filter criteria, as shown in Listing 1−46. OrderID >= 11000 Listing 1−47 shows the output of STATISTICS IO for this new version of the query. Listing 1−47: I/O Measures for a Query with a Completely Qualified Filter Criteria Table 'Order Details'. Scan count 1, logical reads 3, physical reads 0, read−ahead reads 0.
00 sallevel Doing most of the work Planning the work Tell subordinates what to do Tell subordinates what to do Owners and their relatives Owners and their relatives 42 More complex examples of non−equal joins are discussed in Chapter 16. Using Joins to Modify Data Sometimes you need to modify data but the criteria that define which rows need to be affected is based on data that doesn't exist in the modified table. Instead, the required data is in another table. One approach is to use subqueries, which are discussed in Chapter 2.
00. 00 belonging to them or not. The output should look like this: deptno deptname empid empname deptno jobid 300 Sanitation NULL NULL NULL NULL 400 Management 1 Leo 400 30 400 Management 4 Rob 400 30 400 Management 5 Laura 400 30 The answer to this puzzle can be found on pages 671673. 00 Chapter 2: Subqueries and Derived Tables SUBQUERIES ARE SPECIAL CASES of queries within queries. They eliminate the need to save data in temporary tables or variables so that it can be used in subsequent queries later in your code.
Advanced Transact-SQL for SQL Server 2000 by Itzik Ben-Gan