SQL Exercises: Employees whose salary is more than 3700
From the following table, write a SQL query to check whether there are any employees with salaries exceeding 3700. Return first name, last name and department ID.
Sample table: employees
+-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+ | EMPLOYEE_ID | FIRST_NAME | LAST_NAME | EMAIL | PHONE_NUMBER | HIRE_DATE | JOB_ID | SALARY | COMMISSION_PCT | MANAGER_ID | DEPARTMENT_ID | +-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+ | 100 | Steven | King | SKING | 515.123.4567 | 2003-06-17 | AD_PRES | 24000.00 | 0.00 | 0 | 90 | | 101 | Neena | Kochhar | NKOCHHAR | 515.123.4568 | 2005-09-21 | AD_VP | 17000.00 | 0.00 | 100 | 90 | | 102 | Lex | De Haan | LDEHAAN | 515.123.4569 | 2001-01-13 | AD_VP | 17000.00 | 0.00 | 100 | 90 | | 103 | Alexander | Hunold | AHUNOLD | 590.423.4567 | 2006-01-03 | IT_PROG | 9000.00 | 0.00 | 102 | 60 | | 104 | Bruce | Ernst | BERNST | 590.423.4568 | 2007-05-21 | IT_PROG | 6000.00 | 0.00 | 103 | 60 | | 105 | David | Austin | DAUSTIN | 590.423.4569 | 2005-06-25 | IT_PROG | 4800.00 | 0.00 | 103 | 60 | | 106 | Valli | Pataballa | VPATABAL | 590.423.4560 | 2006-02-05 | IT_PROG | 4800.00 | 0.00 | 103 | 60 | | 107 | Diana | Lorentz | DLORENTZ | 590.423.5567 | 2007-02-07 | IT_PROG | 4200.00 | 0.00 | 103 | 60 | | 108 | Nancy | Greenberg | NGREENBE | 515.124.4569 | 2002-08-17 | FI_MGR | 12008.00 | 0.00 | 101 | 100 | | 109 | Daniel | Faviet | DFAVIET | 515.124.4169 | 2002-08-16 | FI_ACCOUNT | 9000.00 | 0.00 | 108 | 100 | | 110 | John | Chen | JCHEN | 515.124.4269 | 2005-09-28 | FI_ACCOUNT | 8200.00 | 0.00 | 108 | 100 | .................... +-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+
Sample Solution:
-- Selecting specific columns (first_name, last_name, department_id) from the 'employees' table
SELECT first_name, last_name, department_id
-- Filtering rows based on the condition that there exists a row in the subquery result set
FROM employees
-- Subquery to check if there exists any row where the 'salary' is greater than 3700 in the 'employees' table
WHERE EXISTS
(SELECT *
FROM employees
-- Condition to check if the 'salary' is greater than 3700
WHERE salary > 3700
);
Sample Output:
first_name last_name department_id Steven King 90 Neena Kochhar 90 Lex De Haan 90 Alexander Hunold 60 Bruce Ernst 60 David Austin 60 Valli Pataballa 60 Diana Lorentz 60 Nancy Greenberg 100 Daniel Faviet 100 John Chen 100 Ismael Sciarra 100 Jose Manuel Urman 100 Luis Popp 100 Den Raphaely 30 Alexander Khoo 30 Shelli Baida 30 Sigal Tobias 30 Guy Himuro 30 Karen Colmenares 30 Matthew Weiss 50 Adam Fripp 50 Payam Kaufling 50 Shanta Vollman 50 Kevin Mourgos 50 Julia Nayer 50 Irene Mikkilineni 50 James Landry 50 Steven Markle 50 Laura Bissot 50 Mozhe Atkinson 50 James Marlow 50 TJ Olson 50 Jason Mallin 50 Michael Rogers 50 Ki Gee 50 Hazel Philtanker 50 Renske Ladwig 50 Stephen Stiles 50 John Seo 50 Joshua Patel 50 Trenna Rajs 50 Curtis Davies 50 Randall Matos 50 Peter Vargas 50 John Russell 80 Karen Partners 80 Alberto Errazuriz 80 Gerald Cambrault 80 Eleni Zlotkey 80 Peter Tucker 80 David Bernstein 80 Peter Hall 80 Christopher Olsen 80 Nanette Cambrault 80 Oliver Tuvault 80 Janette King 80 Patrick Sully 80 Allan McEwen 80 Lindsey Smith 80 Louise Doran 80 Sarath Sewall 80 Clara Vishney 80 Danielle Greene 80 Mattea Marvins 80 David Lee 80 Sundar Ande 80 Amit Banda 80 Lisa Ozer 80 Harrison Bloom 80 Tayler Fox 80 William Smith 80 Elizabeth Bates 80 Sundita Kumar 80 Ellen Abel 80 Alyssa Hutton 80 Jonathon Taylor 80 Jack Livingston 80 Kimberely Grant 0 Charles Johnson 80 Winston Taylor 50 Jean Fleaur 50 Martha Sullivan 50 Girard Geoni 50 Nandita Sarchand 50 Alexis Bull 50 Julia Dellinger 50 Anthony Cabrio 50 Kelly Chung 50 Jennifer Dilly 50 Timothy Gates 50 Randall Perkins 50 Sarah Bell 50 Britney Everett 50 Samuel McCain 50 Vance Jones 50 Alana Walsh 50 Kevin Feeney 50 Donald OConnell 50 Douglas Grant 50 Jennifer Whalen 10 Michael Hartstein 20 Pat Fay 20 Susan Mavris 40 Hermann Baer 70 Shelley Higgins 110 William Gietz 110
Code Explanation:
The said query in SQL that is used to retrieve the first name, last name, and department ID of employees from the 'employees' table who have a salary greater than 3700.
The query uses the EXISTS operator, which checks if the result of a subquery is empty or not. In this case, the subquery is selecting all columns from the 'employees' table where the salary is greater than 3700. If the result of the subquery is not empty, then the EXISTS operator returns true and the rows from the outer query with the matching criteria are returned.
Visual Presentation:
Alternative Statements:
Using JOIN:
SELECT e1.first_name, e1.last_name, e1.department_id
FROM employees e1
JOIN employees e2 ON e2.salary > 3700
WHERE e1.employee_id = e2.employee_id;
Using Subquery with IN:
SELECT first_name, last_name, department_id
FROM employees
WHERE employee_id IN (
SELECT employee_id
FROM employees
WHERE salary > 3700
);
Using Subquery with EXISTS:
SELECT first_name, last_name, department_id
FROM employees e1
WHERE EXISTS (
SELECT 1
FROM employees e2
WHERE e2.salary > 3700
AND e1.employee_id = e2.employee_id
);
Note: These alternative statements will return only those rows whose salary is more than 3700.
Practice Online
Query Visualization:
Duration:
Rows:
Cost:
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Previous SQL Exercise: Salary exceeds the average salary of any department.
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