SQL Exercise: Find those employees who earn more than 8000
SQL SORTING and FILTERING on HR Database: Exercise-2 with Solution
2. From the following table, write a SQL query to find those employees whose salary is higher than 8000. Return first name, last name and department number and salary.
Sample table: employees
Sample Solution:
SELECT first_name,last_name, department_id, salary
FROM employees
WHERE salary > 8000;
Sample Output:
first_name | last_name | department_id | salary ------------+------------+---------------+---------- Steven | King | 90 | 24000.00 Neena | Kochhar | 90 | 17000.00 Lex | De Haan | 90 | 17000.00 Alexander | Hunold | 60 | 9000.00 Nancy | Greenberg | 100 | 12000.00 Daniel | Faviet | 100 | 9000.00 John | Chen | 100 | 8200.00 Den | Raphaely | 30 | 11000.00 Adam | Fripp | 50 | 8200.00 John | Russell | 80 | 14000.00 Karen | Partners | 80 | 13500.00 Alberto | Errazuriz | 80 | 12000.00 Gerald | Cambrault | 80 | 11000.00 Eleni | Zlotkey | 80 | 10500.00 Peter | Tucker | 80 | 10000.00 David | Bernstein | 80 | 9500.00 Peter | Hall | 80 | 9000.00 Janette | King | 80 | 10000.00 Patrick | Sully | 80 | 9500.00 Allan | McEwen | 80 | 9000.00 Clara | Vishney | 80 | 10500.00 Danielle | Greene | 80 | 9500.00 Lisa | Ozer | 80 | 11500.00 Harrison | Bloom | 80 | 10000.00 Tayler | Fox | 80 | 9600.00 Ellen | Abel | 80 | 11000.00 Alyssa | Hutton | 80 | 8800.00 Jonathon | Taylor | 80 | 8600.00 Jack | Livingston | 80 | 8400.00 Michael | Hartstein | 20 | 13000.00 Hermann | Baer | 70 | 10000.00 Shelley | Higgins | 110 | 12000.00 William | Gietz | 110 | 8300.00 (33 rows)
Code Explanation:
The said query in SQL that retrieves first name, last name, department ID, and salary columns from the 'employees' table where the salary is greater than 8000. As a result of the query, all the rows that meet the condition stipulated in the "WHERE" clause will be returned from the 'employees' table.
Relational Algebra Expression:
Relational Algebra Tree:
Practice Online
Query Visualization:
Duration:
Rows:
Cost:
Contribute your code and comments through Disqus.
Previous SQL Exercise: Find those employees who earn below 6000.
Next SQL Exercise: Display Employees whose last name is McEwen.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
SQL: Tips of the Day
Difference between natural join and inner join
One significant difference between INNER JOIN and NATURAL JOIN is the number of columns returned-
Consider:
TableA TableB +------------+----------+ +--------------------+ |Column1 | Column2 | |Column1 | Column3 | +-----------------------+ +--------------------+ | 1 | 2 | | 1 | 3 | +------------+----------+ +---------+----------+
The INNER JOIN of TableA and TableB on Column1 will return
SELECT * FROM TableA AS a INNER JOIN TableB AS b USING (Column1); SELECT * FROM TableA AS a INNER JOIN TableB AS b ON a.Column1 = b.Column1;
+------------+-----------+---------------------+ | a.Column1 | a.Column2 | b.Column1| b.Column3| +------------------------+---------------------+ | 1 | 2 | 1 | 3 | +------------+-----------+----------+----------+
The NATURAL JOIN of TableA and TableB on Column1 will return:
SELECT * FROM TableA NATURAL JOIN TableB +------------+----------+----------+ |Column1 | Column2 | Column3 | +-----------------------+----------+ | 1 | 2 | 3 | +------------+----------+----------+
Ref: https://bit.ly/3AG5CId
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join
We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook