MariaDB Joins

When we use the join keyword query gets executed and a matching record is shown from various tables that may be retrieved using MariaDB JOINS. Every time a SQL query joins two or more tables, a MariaDB JOIN is executed.

Let’s look at how the MariaDB joins work by creating example tables and inserting data into them.

Create Tables

First, let’s create an employee table.

CREATE TABLE employees (
    employee_id INT PRIMARY KEY,
    first_name VARCHAR(50),
    last_name VARCHAR(50),
    department_id INT,
    salary DECIMAL(10, 2),
Hire_date DATE
);

Now let’s create the another table named as worker.

CREATE TABLE worker (
    worker_id INT AUTO_INCREMENT PRIMARY KEY,
    first_name VARCHAR(50),
    last_name VARCHAR(50),
    department VARCHAR(50),
    salary DECIMAL(10, 2),
Hire_date DATE
);

Insert data into both the tables.

Insert Data

INSERT INTO employees VALUES
(1, 'Maram', 'Doe', 101, 50000.00, '2022-01-15'),
(2, 'Vamshi', 'Smith', 102, 60000.00, '2022-02-20'),
(3, 'Sukumar', 'Johnson', 101, 55000.00, '2022-03-25');

INSERT INTO worker VALUES
(101, 'Minal', 'Williams', 'IT', 48000.00, '2022-04-10'),
(102, 'Vardhana', 'Brown', 'HR', 52000.00, '2022-05-15'),
(103, 'Kavya', 'Clark', 'IT', 49000.00, '2022-06-20');

MariaDB’s ability to handle a variety of join types is one of its primary characteristics that makes it an effective tool for managing relational databases. Joins let you describe relationships between tables so you may access data from several tables. We’ll go into the details of MariaDB joins in this post, looking at their kinds, syntax, and practical implementations.