This tutorial aims to provide a comprehensive guide to both MySQL and PostgreSQL, covering everything from basic concepts to advanced techniques. You'll find practical examples and hands-on exercises to help you master these powerful relational database management systems (RDBMS).
MySQL is an open-source relational database management system known for its speed and reliability. Here, we'll cover basic operations and SQL commands in MySQL.
MySQL can be installed on various operating systems. For a detailed guide, refer to the official MySQL documentation.
Creating a Database:
```sql
CREATE DATABASE my_database;
```
Creating a Table:
```sql
CREATE TABLE users (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(100),
email VARCHAR(100)
);
```
Inserting Data:
```sql
INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com');
```
Querying Data:
```sql
SELECT * FROM users;
```
Indexing:
```sql
CREATE INDEX idx_email ON users (email);
```
Joins:
```sql
SELECT orders.id, users.name
FROM orders
INNER JOIN users ON orders.user_id = users.id;
```
PostgreSQL is a powerful, open-source object-relational database system. It is known for its advanced features and standards compliance.
PostgreSQL can be installed on various platforms. For a detailed guide, refer to the official PostgreSQL documentation.
Creating a Database:
```sql
CREATE DATABASE my_database;
```
Creating a Table:
```sql
CREATE TABLE users (
id SERIAL PRIMARY KEY,
name VARCHAR(100),
email VARCHAR(100)
);
```
Inserting Data:
```sql
INSERT INTO users (name, email) VALUES ('John Doe', 'john@example.com');
```
Querying Data:
```sql
SELECT * FROM users;
```
Indexing:
```sql
CREATE INDEX idx_email ON users (email);
```
Joins:
```sql
SELECT orders.id, users.name
FROM orders
INNER JOIN users ON orders.user_id = users.id;
```