SQL Exercise: Display jobs with minimum salaries over 9000

Last update on December 20 2024 11:45:24 (UTC/GMT +8 hours)

37. From the following table, write a SQL query to find details of those jobs where the minimum salary exceeds 9000. Return all the fields of jobs.

Sample table : jobs

+------------+---------------------------------+------------+------------+
| JOB_ID     | JOB_TITLE                       | MIN_SALARY | MAX_SALARY |
+------------+---------------------------------+------------+------------+
| AD_PRES    | President                       |      20080 |      40000 |
| AD_VP      | Administration Vice President   |      15000 |      30000 |
| AD_ASST    | Administration Assistant        |       3000 |       6000 |
| FI_MGR     | Finance Manager                 |       8200 |      16000 |
| FI_ACCOUNT | Accountant                      |       4200 |       9000 |
| AC_MGR     | Accounting Manager              |       8200 |      16000 |
| AC_ACCOUNT | Public Accountant               |       4200 |       9000 |
| SA_MAN     | Sales Manager                   |      10000 |      20080 |
| SA_REP     | Sales Representative            |       6000 |      12008 |
| PU_MAN     | Purchasing Manager              |       8000 |      15000 |
| PU_CLERK   | Purchasing Clerk                |       2500 |       5500 |
| ST_MAN     | Stock Manager                   |       5500 |       8500 |
| ST_CLERK   | Stock Clerk                     |       2008 |       5000 |
| SH_CLERK   | Shipping Clerk                  |       2500 |       5500 |
| IT_PROG    | Programmer                      |       4000 |      10000 |
| MK_MAN     | Marketing Manager               |       9000 |      15000 |
| MK_REP     | Marketing Representative        |       4000 |       9000 |
| HR_REP     | Human Resources Representative  |       4000 |       9000 |
| PR_REP     | Public Relations Representative |       4500 |      10500 |
+------------+---------------------------------+------------+------------+

Sample Solution:

-- Selecting all columns (*) from the 'jobs' table
SELECT * 	
-- Specifying the table to retrieve data from ('jobs')
FROM jobs 
-- Filtering the results to include rows where 'min_salary' is greater than 9000
WHERE min_salary > 9000;

Sample Output:

 job_id  |           job_title           | min_salary | max_salary
---------+-------------------------------+------------+------------
 AD_PRES | President                     |      20000 |      40000
 AD_VP   | Administration Vice President |      15000 |      30000
 SA_MAN  | Sales Manager                 |      10000 |      20000
(3 rows)

Code Explanation:

The said query in SQL which selects all columns (*) from the 'jobs' table where the value in the "min_salary" column is greater than 9000. The resulting output will be all the rows from the 'jobs' table where the minimum salary is greater than 9000.

Relational Algebra Expression: