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

Using the SELECT statement and FROM clause

To extract data from a table, you need to use a SQL SELECT query. The SELECT query allows you to specify what data you want from a table using a simple query structure.

Understanding the SELECT statement and the FROM clause

At a minimum, every SELECT statement on a table needs the SELECT and FROM keywords. If you want to select all the rows and columns from the appearances table in lahmansbaseballdb, you should execute the following query:

SELECT * FROM lahmansbaseballdb.appearances;
Make sure to add a semicolon (;) to the end of your SQL statements. The semicolon marks the end of a query. The query may execute without it, but it is good practice to ensure that the SQL code will...