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)
1
Section 1: Database Fundamentals
7
Section 2: Basic SQL Querying
11
Section 3: Advanced SQL Querying
16
Section 4: Presenting Your Findings
19
Section 5: SQL Best Practices

Summary

In this chapter, you learned how to use expressions, including using literals, operators, columns, and built-in functions to create expressions. You learned how to use each and that you can use them all together to create expressions.

You learned about the different types of built-in functions, including string, numeric, datetime, and advanced functions, which include casting and converting to other data types. There are many different kinds of string, numeric, and datetime built-in functions. They help you to work with expressions to ensure they are in the format and data type that you want. You also learned how to work with NULL values. Additionally, you learned how indexing might be affected by built-in functions.

Next, you learned how to use statistical functions, including how to get and use variance and standard deviation with the STDDEV and VARIANCE functions...