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SQL Query Design Patterns and Best Practices

You're reading from  SQL Query Design Patterns and Best Practices

Product type Book
Published in Mar 2023
Publisher Packt
ISBN-13 9781837633289
Pages 270 pages
Edition 1st Edition
Languages
Concepts
Authors (6):
Steve Hughes Steve Hughes
Profile icon Steve Hughes
LinkedIn
Steve Hughes is a senior director of data and analytics at 3Cloud. In this role, he focuses on growing the teams' skills and capabilities to deliver data projects with Azure. In his 20 years of experience in technology, much of the time was spent on creating business intelligence (BI) solutions and helping customers implement BI and cloud solutions. He is passionate about helping customers understand that data is valuable and profitable. Steve has recently been diagnosed with ALS but continues to work and share with others what he has learned. Steve is also the founder of Data on Wheels where he blogs with one of his daughters on topics such as data, analytics, and work enablement
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See other products by Steve Hughes
Dennis Neer Dennis Neer
Profile icon Dennis Neer
LinkedIn
Dennis Neer is a senior architect of data and analytics at 3Cloud. In this role, he focuses on working with clients to design Azure solutions for their data and analytic needs to improve their business decision-making process. This includes using tools such as SQL Server databases, Synapse, data lakes, and Power BI. In his 30 years of experience in technology, much of the time was spent on designing and building database and visualization solutions. He is passionate about helping businesses to understand data and use it to their advantage during their decision-making process
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See other products by Dennis Neer
Dr. Ram Babu Singh Dr. Ram Babu Singh
Profile icon Dr. Ram Babu Singh
LinkedIn
Dr. Ram Babu Singh is a Microsoft Certified Professional with a Ph.D. in computer science. He is a lead architect of data and analytics at 3Cloud, using complex data analytics and data science solutions. In his 20 years of career, over a decade was spent in leadership positions providing data science and data platform solutions to the world's top IT consulting companies. He has been published in international journals and has a patent in his name
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Shabbir H. Mala Shabbir H. Mala
Profile icon Shabbir H. Mala
LinkedIn
Shabbir H. Mala is a director of data and analytics at 3Cloud. He has over 23 years of experience in thought leadership and consulting, developing complex data solutions, business systems, and processes using Azure Data Services and Power BI. He currently manages a team of over 40 principals and senior architects focusing on business growth, successful project delivery, and client experience. He has done talks at Power BI conferences as well as user groups. He has been awarded Microsoft FastTrack Solution Architect in 2021 and 2022. He is currently living in Chicago, married, and has three beautiful kids
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See other products by Shabbir H. Mala
Leslie Andrews Leslie Andrews
Profile icon Leslie Andrews
LinkedIn
Andrews is a lead data architect of data and analytics at 3Cloud. Working in the IT sector for over 20 years in local government, electrical supply, law enforcement, and healthcare, she has broad experience to draw from to assist clients in making data more accessible for end users. Leslie's expertise includes SQL development, ETL, data warehousing, data modeling, and analytics. Leslie currently holds several Microsoft certifications related to Azure technologies for data engineering. She approaches each day as an opportunity to use data and technology to make it easier for others to do their daily work. Leslie has been doing public speaking since 2015, was an IDERA ACE in 2019, and is a supporter of and contributor to the SQL community
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See other products by Leslie Andrews
Chi Zhang Chi Zhang
Profile icon Chi Zhang
LinkedIn
Chi Zhang is a lead data architect at 3Cloud. After completing her master's degree at Carnegie Mellon University, she worked in data consulting for the past 5 years. She has helped clients from various industries to deliver customized data solutions within Azure. Focusing on ETL, data warehousing, data modeling, and BI reporting, Chi solves data problems for clients and builds data solutions that provide business users with better operational insights and a smoother experience. Recently, she has continued to grow her footprint in the Azure community: earning certifications in Azure data engineering and data science, giving her first public tech talk, co-authoring a technical book, and becoming an active contributor to the SQL community
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Table of Contents (21) Chapters

Preface 1. Part 1: Refining Your Queries to Get the Results You Need
2. Chapter 1: Reducing Rows and Columns in Your Result Sets 3. Chapter 2: Efficiently Aggregating Data 4. Chapter 3: Formatting Your Results for Easier Consumption 5. Chapter 4: Manipulating Data Results Using Conditional SQL 6. Part 2: Solving Complex Business and Data Problems in Your Queries
7. Chapter 5: Using Common Table Expressions 8. Chapter 6: Analyze Your Data Using Window Functions 9. Chapter 7: Reshaping Data with Advanced Techniques 10. Chapter 8: Impact of SQL Server Security on Query Results 11. Part 3: Optimizing Your Queries to Improve Performance
12. Chapter 9: Understanding Query Plans 13. Chapter 10: Understanding the Impact of Indexes on Query Design 14. Part 4: Working with Your Data on the Modern Data Platform
15. Chapter 11: Handling JSON Data in SQL Server 16. Chapter 12: Integrating File Data and Data Lake Content with SQL 17. Chapter 13: Organizing and Sharing Your Queries with Jupyter Notebooks 18. Index 19. Other Books You May Enjoy Appendix: Preparing Your Environment

Working with JSON data in SQL queries

So far, we have focused on how to build JSON-formatted results from the queries we have been creating. In this section, we are going to explore how to work with JSON data in our queries. We will look at how to discover and validate our JSON data, followed by extracting and modifying that information. We will wrap this section up by building out a query to convert JSON data into tabular data with a relationship to relational data as well.

Discovering JSON data in SQL Server

There are two primary functions we will work with within SQL Server to discover and validate JSON data. These functions confirm that we are working with JSON data and that the data we are looking at exists in the JSON document.

ISJSON

ISJSON is used to evaluate a variable, expression, or field in a SQL query to determine that the structure of that data is properly formatted JSON. In our example, we will investigate the CustomerOrderHistory field in our CustomerOrders...

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Authors (6)

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Profile icon Steve Hughes
LinkedIn
Steve Hughes is a senior director of data and analytics at 3Cloud. In this role, he focuses on growing the teams' skills and capabilities to deliver data projects with Azure. In his 20 years of experience in technology, much of the time was spent on creating business intelligence (BI) solutions and helping customers implement BI and cloud solutions. He is passionate about helping customers understand that data is valuable and profitable. Steve has recently been diagnosed with ALS but continues to work and share with others what he has learned. Steve is also the founder of Data on Wheels where he blogs with one of his daughters on topics such as data, analytics, and work enablement
Read more
See other products by Steve Hughes
Profile icon Dennis Neer
LinkedIn
Dennis Neer is a senior architect of data and analytics at 3Cloud. In this role, he focuses on working with clients to design Azure solutions for their data and analytic needs to improve their business decision-making process. This includes using tools such as SQL Server databases, Synapse, data lakes, and Power BI. In his 30 years of experience in technology, much of the time was spent on designing and building database and visualization solutions. He is passionate about helping businesses to understand data and use it to their advantage during their decision-making process
Read more
See other products by Dennis Neer
Profile icon Dr. Ram Babu Singh
LinkedIn
Dr. Ram Babu Singh is a Microsoft Certified Professional with a Ph.D. in computer science. He is a lead architect of data and analytics at 3Cloud, using complex data analytics and data science solutions. In his 20 years of career, over a decade was spent in leadership positions providing data science and data platform solutions to the world's top IT consulting companies. He has been published in international journals and has a patent in his name
Read more
See other products by Dr. Ram Babu Singh
Profile icon Shabbir H. Mala
LinkedIn
Shabbir H. Mala is a director of data and analytics at 3Cloud. He has over 23 years of experience in thought leadership and consulting, developing complex data solutions, business systems, and processes using Azure Data Services and Power BI. He currently manages a team of over 40 principals and senior architects focusing on business growth, successful project delivery, and client experience. He has done talks at Power BI conferences as well as user groups. He has been awarded Microsoft FastTrack Solution Architect in 2021 and 2022. He is currently living in Chicago, married, and has three beautiful kids
Read more
See other products by Shabbir H. Mala
Profile icon Leslie Andrews
LinkedIn
Andrews is a lead data architect of data and analytics at 3Cloud. Working in the IT sector for over 20 years in local government, electrical supply, law enforcement, and healthcare, she has broad experience to draw from to assist clients in making data more accessible for end users. Leslie's expertise includes SQL development, ETL, data warehousing, data modeling, and analytics. Leslie currently holds several Microsoft certifications related to Azure technologies for data engineering. She approaches each day as an opportunity to use data and technology to make it easier for others to do their daily work. Leslie has been doing public speaking since 2015, was an IDERA ACE in 2019, and is a supporter of and contributor to the SQL community
Read more
See other products by Leslie Andrews
Profile icon Chi Zhang
LinkedIn
Chi Zhang is a lead data architect at 3Cloud. After completing her master's degree at Carnegie Mellon University, she worked in data consulting for the past 5 years. She has helped clients from various industries to deliver customized data solutions within Azure. Focusing on ETL, data warehousing, data modeling, and BI reporting, Chi solves data problems for clients and builds data solutions that provide business users with better operational insights and a smoother experience. Recently, she has continued to grow her footprint in the Azure community: earning certifications in Azure data engineering and data science, giving her first public tech talk, co-authoring a technical book, and becoming an active contributor to the SQL community
Read more
See other products by Chi Zhang
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