Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

SQL subqueries on employee Database: Display the unique department of the employees

SQL subqueries on employee Database: Exercise-59 with Solution

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

59. From the following table, write a SQL query to find the unique department of the employees. Return complete information about the employees.

Sample table: employees


Sample table: department


Sample Solution:

SELECT *
FROM department
WHERE dep_id IN
    (SELECT DISTINCT dep_id
     FROM employees);

Sample Output:

 dep_id | dep_name  | dep_location
--------+-----------+--------------
   1001 | FINANCE   | SYDNEY
   2001 | AUDIT     | MELBOURNE
   3001 | MARKETING | PERTH
(3 rows)

Practice Online


Structure of employee Database:

employee database structure

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

Previous: From the following table, write a SQL query to find those departments where the average salary is less than the averages for all departments. Return department ID, average salary.
Next: From the following tables, write a SQL query to list the details of the employees working at PERTH.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3