Tutorial 75 Parte 004 Creación de la base de datos y la entidad Country

Introduction

This tutorial will guide you through the process of creating a database and the entity Country, as demonstrated in Juan Zuluaga's video. This step-by-step guide is particularly useful for developers looking to set up a foundational database structure for their applications.

Step 1: Setting Up the Development Environment

To begin, ensure you have your development environment properly installed and configured. Follow these steps:

1. Install Required Software:

   • Download and install the following tools:
     • A database management system (e.g., MySQL, PostgreSQL).
     • A code editor (e.g., Visual Studio Code, Sublime Text).
   • For detailed installation instructions, refer to the development setup guide here.

2. Clone the Repository:

   • Use Git to clone the repository that contains the project files.
   • Run the following command in your terminal:

     git clone https://github.com/Zulu55/Fantasy.git
     

Step 2: Creating the Database

Now that your environment is set up, you can create a new database. Follow these steps:

1. Open Your Database Management Tool:

   • Launch MySQL Workbench or your preferred database tool.

2. Create a New Database:

   • Execute the following SQL command to create a database:

     CREATE DATABASE fantasy_db;
     

3. Select the Database:

   • Use the command to select the newly created database:

     USE fantasy_db;
     

Step 3: Defining the Country Entity

Next, you will define the Country entity, which will serve as a fundamental part of your database.

1. Create the Country Table:

   • Execute the following SQL command to create a table for the Country entity:

     CREATE TABLE Country (
         id INT AUTO_INCREMENT PRIMARY KEY,
         name VARCHAR(100) NOT NULL,
         code VARCHAR(10) NOT NULL,
         population INT
     );
     

2. Set Constraints and Data Types:

   • Ensure that the name field is required (NOT NULL).
   • The id field will auto-increment for each new entry.
   • Use appropriate data types for each field to maintain data integrity.

Step 4: Inserting Sample Data

To validate your Country table, insert some sample data.

1. Insert Sample Entries:

   • Use the following SQL command to add data:

     INSERT INTO Country (name, code, population) VALUES
     ('United States', 'US', 331002651),
     ('Canada', 'CA', 37742154),
     ('Mexico', 'MX', 128932753);
     

2. Verify the Data:

   • Execute the command to check if the data was inserted correctly:

     SELECT * FROM Country;
     

Conclusion

In this tutorial, you have learned how to set up your development environment, create a database, define the Country entity, and insert sample data. These foundational steps are crucial for developing applications that require a structured database.

Next Steps

• Explore adding more entities and relationships to your database.
• Consider implementing additional features like data validation and error handling to enhance your database management skills.