How to use group concat in mysql with order by with example explain

The GROUP_CONCAT function in MySQL allows you to concatenate the values of a specific column of all matching rows into a single string. You can also use the ORDER BY clause within the GROUP_CONCAT function to sort the values within the concatenated string.

Here’s an example of how to use GROUP_CONCAT with ORDER BY:

Suppose you have a table named “employees” with the following columns: “id”, “name”, and “department”.

+----+----------+-------------+| id | name     | department  |+----+----------+-------------+| 1  | John     | Sales       || 2  | Jane     | Marketing   || 3  | Bob      | Sales       || 4  | Sarah    | Marketing   |+----+----------+-------------+

If you want to concatenate the names of all employees in each department, sorted alphabetically by name, you can use the following query:

SELECT department, GROUP_CONCAT(name ORDER BY name ASC) AS employee_namesFROM employeesGROUP BY department;

This query will produce the following result:

+-------------+------------------------+| department  | employee_names         |+-------------+------------------------+| Sales       | Bob,John               || Marketing   | Jane,Sarah             |+-------------+------------------------+

In this example, the GROUP_CONCAT function concatenates the “name” column for each group of rows with the same “department” value, sorted alphabetically by name using the ORDER BY clause within the GROUP_CONCAT function.

The result shows the concatenated employee names for each department, separated by a comma.