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

Exploring your dataset

Exploring your dataset is vital so that you can get acquainted with and learn more about your data. You can do this by checking the statistical identity of your data and checking for rare, missing, and duplicate values. Additionally, you can either consult the expert or become the expert on the dataset.

Getting to know your data using statistical identities

Getting to know your data is vital so you can understand how to analyze and tell a story with it. There are a few built-in functions in MySQL that you can use to get to know your data, including the following:

  • AVG: Returns the average of an expression
  • COUNT: Returns the number of records
  • MAX: Returns the maximum value in a set of values
  • MIN:...