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MySQL - Select from multiple tables (using JOIN)

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Created by:
Teilsa
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In this article, we would like to show you how to select from multiple tables using JOIN clause in MySQL.

Quick solution:

Practical example

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To show how to count rows per day, we will use the following tables:

groups table:

MySQL - example data used to select from multiple tables
MySQL - example data used to select from multiple tables

users table:

MySQL - example data used to select from multiple tables
MySQL - example data used to select from multiple tables

Note:

At the end of this article you can find database preparation SQL queries.

Example

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In this example, we will display the following columns from users table:

  • id,
  • username,
  • group_id,

and the following column from groups table:

  • group_name

We will use aliases:

  • u - for users table,
  • g - for groups table.

In our example group_id is a reference column for `groups`.`id` (g.`id`). 

Query:

Result:

MySQL - select from multiple tables using JOIN - result
MySQL - select from multiple tables using JOIN - result

Database preparation

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create_tables.sql file:

insert_data.sql file:

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MySQL - Select from multiple tables (using JOIN)
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