Book Image

SQL Query Design Patterns and Best Practices

By : Steve Hughes, Dennis Neer, Dr. Ram Babu Singh, Shabbir H. Mala, Leslie Andrews, Chi Zhang
5 (1)
Book Image

SQL Query Design Patterns and Best Practices

5 (1)
By: Steve Hughes, Dennis Neer, Dr. Ram Babu Singh, Shabbir H. Mala, Leslie Andrews, Chi Zhang

Overview of this book

SQL has been the de facto standard when interacting with databases for decades and shows no signs of going away. Through the years, report developers or data wranglers have had to learn SQL on the fly to meet the business needs, so if you are someone who needs to write queries, SQL Query Design and Pattern Best Practices is for you. This book will guide you through making efficient SQL queries by reducing set sizes for effective results. You’ll learn how to format your results to make them easier to consume at their destination. From there, the book will take you through solving complex business problems using more advanced techniques, such as common table expressions and window functions, and advance to uncovering issues resulting from security in the underlying dataset. Armed with this knowledge, you’ll have a foundation for building queries and be ready to shift focus to using tools, such as query plans and indexes, to optimize those queries. The book will go over the modern data estate, which includes data lakes and JSON data, and wrap up with a brief on how to use Jupyter notebooks in your SQL journey. By the end of this SQL book, you’ll be able to make efficient SQL queries that will improve your report writing and the overall SQL experience.
Table of Contents (21 chapters)
1
Part 1: Refining Your Queries to Get the Results You Need
6
Part 2: Solving Complex Business and Data Problems in Your Queries
11
Part 3: Optimizing Your Queries to Improve Performance
14
Part 4: Working with Your Data on the Modern Data Platform

Validating security settings

If you are interested in following the steps in this section in your personal environment, you will need to create a database-level login. You can refer https://learn.microsoft.com/en-us/sql/relational-databases/security/row-level-security?view=sql-server-ver16 for the steps to create the login. The login that is created when you do an initial install of SQL Server will only create the server-level login.

Security settings will normally be controlled by the DBA and are out of scope of this book. You can reference the previous link for more details regarding SQL Server security. Before you approach your DBA, you can attempt to see whether there is any security applied to your ID by taking the following steps:

  1. Start by logging in to SQL Server Management Studio (SSMS) and expand the database that you are working with. This is shown in the following screenshot:
Figure 8.3 – Log in to SSMS and expand the database

Figure 8.3 – Log in to SSMS and expand the database...