Exam Ref 70-761 Querying Data with Transact-SQL summary

Understanding SQL Data Management and Querying

In Exam Ref 70-761 Querying Data with Transact-SQL by Itzik Ben-Gan, we delve into the world of managing and querying data using Structured Query Language (SQL). The book begins by introducing the SQL Server platform and Transact-SQL language, which is the primary focus of the exam. It explains the basic concepts of databases, tables, and data types, and the tools and techniques used to manage and query data efficiently.

The book then moves on to explore the fundamental aspects of querying data, starting with simple SELECT statements and gradually progressing to more complex queries. It covers filtering and sorting data, using built-in functions, and combining data from multiple tables using joins. It also discusses the use of set operators, subqueries, and common table expressions to perform advanced data manipulation and retrieval tasks.

Advanced Data Manipulation and Programming

As we move further into the book, we encounter more advanced topics related to data manipulation and programming with Transact-SQL. It covers the use of window functions, ranking functions, and pivot and unpivot operations to perform complex data transformations. The book also discusses the creation and manipulation of views, stored procedures, user-defined functions, and triggers, which are essential for efficient database programming.

Furthermore, Exam Ref 70-761 delves into the aspects of error handling, transactions, and concurrency control in SQL Server. It explains how to handle errors gracefully, manage transactions effectively, and ensure data integrity in multi-user environments. These are crucial skills for database developers and administrators to maintain the reliability and consistency of their databases.

Working with JSON and XML Data

In the later chapters, the book explores the handling of non-relational data formats, such as JSON and XML, in SQL Server. It explains the native support for these data types and demonstrates how to query, modify, and transform JSON and XML data using Transact-SQL. As organizations increasingly deal with diverse data formats, these skills become highly valuable for database professionals.

Moreover, the book discusses the integration of SQL Server with Azure SQL Database, Microsoft's cloud-based database service. It covers the concepts of elastic databases, security, and performance tuning in Azure SQL Database, providing a comprehensive understanding of working with SQL Server in the cloud environment.

Preparing for the 70-761 Exam

Throughout the book, Ben-Gan provides numerous examples, exercises, and practice questions to reinforce the concepts and prepare readers for the 70-761 exam. Additionally, the book emphasizes the importance of practical experience and encourages readers to apply the learned concepts in real-world scenarios. It also provides valuable tips for exam preparation and insights into the exam structure and question formats.

In conclusion, Exam Ref 70-761 Querying Data with Transact-SQL is an essential guide for IT professionals aiming to demonstrate their expertise in querying and managing data with Transact-SQL in SQL Server 2016. It not only equips readers with the knowledge required to pass the 70-761 exam but also provides a solid foundation for working effectively with SQL Server databases in various professional roles.