В книге изложены основы программирования на языке T-SQL. Вы научитесь программировать и писать запросы для Microsoft SQL Server 2012, а большое количество примеров и упражнений помогут вам начать создавать эффективный код. В книге вы познакомитесь с языком запросов T-SQL (Transact-SQL), который используется в сервере баз данных Microsoft SQL Server и является разновидностью стандартов ISO и ANSI для языка SQL. Вы изучите теорию, лежащую в основе этой технологии, узнаете, как писать код для получения и изменения данных, а также получите общее представление о программируемых объектах. Издание предназначено для начинающих, но вовсе не ограничивается набором пошаговых инструкций. По мере изучения синтаксиса запросов вы углубитесь в логику языка T-SQL и его элементов. Некоторые темы будут сложны для тех, кто впервые столкнулся с технологией T-SQL. Такие разделы являются необязательными. Смело беритесь за них, если у вас не возникает трудностей с остальным материалом. В противном случае вы можете вернуться к ним попозже, когда накопите опыт. Факультативные разделы для углубленного чтения выделены особым образом.
Gain a solid understanding of T-SQL—and write better queries
Master the fundamentals of Transact-SQL—and develop your own code for querying and modifying data in Microsoft® SQL Server® 2012. Led by a SQL Server expert, you’ll learn the concepts behind T-SQL querying and programming, and then apply your knowledge with exercises in each chapter. Once you understand the logic behind T-SQL, you’ll quickly learn how to write effective code—whether you’re a programmer or database administrator.
Discover how to:
- Work with programming practices unique to T-SQL
- Create database tables and define data integrity
- Query multiple tables using joins and subqueries
- Simplify code and improve maintainability with table expressions
- Implement insert, update, delete, and merge data modification strategies
- Tackle advanced techniques such as window functions, pivoting and grouping sets
- Control data consistency using isolation levels, and mitigate deadlocks and blocking
- Take T-SQL to the next level with programmable objects
Get started with the fundamentals of Transact-SQL and learn how to write efficient and powerful database queries. Gain a solid understanding of T-SQL-and write better queries Master the fundamentals of Transact-SQL-and develop your own code for querying and modifying data in Microsoft SQL Server 2012. You'll learn the concepts behind T-SQL querying and programming, and then apply your knowledge with exercises in each chapter. Once you understand the logic behind T-SQL, you'll quickly learn how to write effective code-whether you're a programmer or database administrator. Discover how to: Work with programming practices unique to T-SQL, Create database tables and define data integrity, Query multiple tables using joins and subqueries, Simplify code and improve maintainability with table expressions, Implement insert, update, delete, and merge data modification strategies, Tackle advanced techniques such as window functions, pivoting and grouping sets, Control data consistency using isolation levels, and mitigate deadlocks and blocking, Take T-SQL to the next level with programmable objects 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 Master the fundamentals of Transact-SQL, and develop your own code for querying and modifying data in Microsoft SQL Server 2012. Led by a SQL Server expert, you'll learn the concepts behind T-SQL querying and programming, and then apply your knowledge with exercises in each chapter. Once you understand the logic behind T-SQL, you'll quickly learn how to write effective code whether you're a programmer or database administrator
