SQLite Exercise: Find the names, the salary of the employees whose salary is greater than the average salary
Write a query to find the names (first_name, last_name), the salary of the employees whose salary is greater than the average salary.
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 | 1987-06-17 | AD_PRES | 24000.00 | 0.00 | 0 | 90 | | 101 | Neena | Kochhar | NKOCHHAR | 515.123.4568 | 1987-06-18 | AD_VP | 17000.00 | 0.00 | 100 | 90 | | 102 | Lex | De Haan | LDEHAAN | 515.123.4569 | 1987-06-19 | AD_VP | 17000.00 | 0.00 | 100 | 90 | | 103 | Alexander | Hunold | AHUNOLD | 590.423.4567 | 1987-06-20 | IT_PROG | 9000.00 | 0.00 | 102 | 60 | | 104 | Bruce | Ernst | BERNST | 590.423.4568 | 1987-06-21 | IT_PROG | 6000.00 | 0.00 | 103 | 60 | | 105 | David | Austin | DAUSTIN | 590.423.4569 | 1987-06-22 | IT_PROG | 4800.00 | 0.00 | 103 | 60 | | 106 | Valli | Pataballa | VPATABAL | 590.423.4560 | 1987-06-23 | IT_PROG | 4800.00 | 0.00 | 103 | 60 | | 107 | Diana | Lorentz | DLORENTZ | 590.423.5567 | 1987-06-24 | IT_PROG | 4200.00 | 0.00 | 103 | 60 | | 108 | Nancy | Greenberg | NGREENBE | 515.124.4569 | 1987-06-25 | FI_MGR | 12000.00 | 0.00 | 101 | 100 | | 109 | Daniel | Faviet | DFAVIET | 515.124.4169 | 1987-06-26 | FI_ACCOUNT | 9000.00 | 0.00 | 108 | 100 | ........... | 206 | William | Gietz | WGIETZ | 515.123.8181 | 1987-10-01 | AC_ACCOUNT | 8300.00 | 0.00 | 205 | 110 | +-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+
SQLite Code:
-- Selecting the first name, last name, and salary of employees
SELECT first_name, last_name, salary FROM employees
-- Filtering the results to include only rows where the salary is greater than the average salary
WHERE salary > (SELECT AVG(salary) FROM employees);
Output:
first_name last_name salary ---------- ---------- -------- Steven King 24000 Neena Kochhar 17000 Lex De Haan 17000 Alexander Hunold 9000 Nancy Greenberg 12000 ... ... ... Michael Hartstein 13000 Susan Mavris 6500 Hermann Baer 10000 Shelley Higgins 12000 William Gietz 8300
Explanation:
The above SQLite query selects the first name, last name, and salary of employees from the "employees" table, including only those employees whose salary is greater than the average salary. The average salary is determined using a subquery in the WHERE clause.
Here's a brief explanation of each part of SQLite code:
- SELECT clause:
- It selects the "first_name," "last_name," and "salary" columns.
- FROM clause:
- Specifies the table from which to retrieve the data, in this case, the "employees" table.
- WHERE clause:
- Filters the results to include only rows where the "salary" is greater than the average salary.
- Subquery:
- The subquery (SELECT AVG(salary) FROM employees) calculates the average salary from the same "employees" table.
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Practice SQLite Online
Model Database
Structure of 'hr' database :
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