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 query a single table. This included learning how to use the SQL SELECT statement and the FROM, WHERE, and ORDER BY clauses.

With the SELECT and FROM clauses, you learned how to select distinct records with the DISTINCT keyword, how to limit results with the LIMIT keyword, how to save a SQL query to a file, and how to add proper comments to SQL code.

With the WHERE clause, you learned how and when to use the WHERE clause, along with AND, OR, NOT, IN, and BETWEEN, and how to use with the percent sign (%) and underscore (_) wildcards.

With the ORDER BY clause, you learned how to order query results by one or more columns.

Finally, you learned how to tell which index your query is using and if you need additional indexes by using EXPLAIN or the visual explain tool in MySQL Workbench. You also learned how to add an index to make the query...