Book Image

Learn SQL Database Programming

By : Josephine Bush
5 (1)
Book Image

Learn SQL Database Programming

5 (1)
By: Josephine Bush

Overview of this book

SQL is a powerful querying language that's used to store, manipulate, and retrieve data, and it is one of the most popular languages used by developers to query and analyze data efficiently. If you're looking for a comprehensive introduction to SQL, Learn SQL Database Programming will help you to get up to speed with using SQL to streamline your work in no time. Starting with an overview of relational database management systems, this book will show you how to set up and use MySQL Workbench and design a database using practical examples. You'll also discover how to query and manipulate data with SQL programming using MySQL Workbench. As you advance, you’ll create a database, query single and multiple tables, and modify data using SQL querying. This SQL book covers advanced SQL techniques, including aggregate functions, flow control statements, error handling, and subqueries, and helps you process your data to present your findings. Finally, you’ll implement best practices for writing SQL and designing indexes and tables. By the end of this SQL programming book, you’ll have gained the confidence to use SQL queries to retrieve and manipulate data.
Table of Contents (24 chapters)
Section 1: Database Fundamentals
Section 2: Basic SQL Querying
Section 3: Advanced SQL Querying
Section 4: Presenting Your Findings
Section 5: SQL Best Practices


In this chapter, you learned how to use advanced querying techniques. First, you learned how to use subqueries, which includes non-correlated subqueries and how to use each with the SELECT, FROM, and WHERE clauses, and also how to use them in INSERT, UPDATE, and DELETE queries. You also learned about correlated subqueries and how to use them with the SELECT, FROM, and WHERE clauses.

Next, you learned about the different kinds of CTEs and how to use them, including recursive and non-recursive. Then, you learned about query hints and how to choose which index your query will use. Finally, you learned about isolation levels, which include four levels and what happens during each level. You also learned how to set your queries to use a specific isolation level.

In the next chapter, you will learn how to create programmable objects. By the end of the next chapter, you will...