Microsoft SQL Server 2012 High-Performance T-SQL Using Window Functions

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Название: Microsoft SQL Server 2012 High-Performance T-SQL Using Window Functions

Автор: Itzik Ben-Gan

Издательство: Microsoft Press

ISBN: 0735658366

Год: 2012

Страниц: 244

Формат: PDF

Размер: 17 Mb

Язык: Английский

Apply powerful window functions in T-SQL—and increase the performance and speed of your queries

Optimize your queries—and obtain simple and elegant solutions to a variety of problems—using window functions in Transact-SQL. Led by T-SQL expert Itzik Ben-Gan, you’ll learn how to apply calculations against sets of rows in a flexible, clear, and efficient manner. Ideal whether you’re a database administrator or developer, this practical guide demonstrates ways to use more than a dozen T-SQL querying solutions to address common business tasks.

Discover how to:

Go beyond traditional query approaches to express set calculations more efficiently

Delve into ordered set functions such as rank, distribution, and offset

Implement hypothetical set and inverse distribution functions in standard SQL

Use strategies for improving sequencing, paging, filtering, and pivoting

Increase query speed using partitioning, ordering, and coverage indexing

Apply new optimization iterators such as Window Spool

Handle common issues such as running totals, intervals, medians, and gaps