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

Understanding string data types

String data types can hold plain text and binary data. This section walks you through the different string data types in MySQL. This section also shows you the differences between Oracle, PostgreSQL, and SQL Server string data types.

String data types in MySQL

Let's discuss the string data types in MySQL:

  • CHAR: It is a fixed-length string, which can contain letters, numbers, and special characters. This type is blank-padded and contains trailing blanks in the field. This field can range from 0 to 255, and the default (if nothing is specified, that is, just using CHAR instead of CHAR(10)) is 1. The size in parenthesis denotes the maximum length of the char specified by the user when creating...