﻿ SQL: Display the unique department with jobs

# SQL Exercise: Display the unique department with jobs

## SQL employee Database: Exercise-10 with Solution

[An editor is available at the bottom of the page to write and execute the scripts.]

10. From the following table, write a SQL query to find the unique department with jobs. Return department ID, Job name.

Sample table: employees

Pictorial Presentation:

Sample Solution:

``````SELECT DISTINCT dep_id,
job_name
FROM employees ;
``````

Sample Output:

``` dep_id | job_name
--------+-----------
3001 | MANAGER
2001 | ANALYST
3001 | SALESMAN
1001 | MANAGER
1001 | PRESIDENT
2001 | MANAGER
2001 | CLERK
1001 | CLERK
3001 | CLERK
(9 rows)
```

Explanation:

The said query in SQL that selects distinct combinations of the dep_id and job_name columns from the 'employees' table. The "DISTINCT" keyword ensures that each combination of dep_id and job_name appears only once in the result set, even if there are multiple employees with the same job and department.

A query like this might be used to get all unique job titles and departments in the company based on the "employees" table.

Relational Algebra Expression:

Relational Algebra Tree:

## Practice Online

Sample Database: employee

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous SQL Exercise: List employees id, salary, and commission.
Next SQL Exercise: List the employees not in department 2001.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿