SQL Exercise: Find employees who is working except given departments
20. From the following table, write a SQL query to find those employees work in the departments that are not part of the department 50 or 30 or 80. Return employee_id, first_name,job_id, 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 | ...... | 206 | William | Gietz | WGIETZ | 515.123.8181 | 2002-06-07 | AC_ACCOUNT | 8300.00 | 0.00 | 205 | 110 | +-------------+-------------+-------------+----------+--------------------+------------+------------+----------+----------------+------------+---------------+
Sample Solution:
-- Selecting 'employee_id', 'first_name', 'job_id', and 'department_id' columns from the 'employees' table
SELECT employee_id, first_name, job_id, department_id
-- Specifying the table to retrieve data from ('employees')
FROM employees
-- Filtering the results based on the condition that 'department_id' is not in (50, 30, 80)
WHERE department_id NOT IN (50, 30, 80);
Sample Output:
employee_id | first_name | job_id | department_id
-------------+-------------+------------+---------------
100 | Steven | AD_PRES | 90
101 | Neena | AD_VP | 90
102 | Lex | AD_VP | 90
103 | Alexander | IT_PROG | 60
104 | Bruce | IT_PROG | 60
105 | David | IT_PROG | 60
106 | Valli | IT_PROG | 60
107 | Diana | IT_PROG | 60
108 | Nancy | FI_MGR | 100
109 | Daniel | FI_ACCOUNT | 100
110 | John | FI_ACCOUNT | 100
111 | Ismael | FI_ACCOUNT | 100
112 | Jose Manuel | FI_ACCOUNT | 100
113 | Luis | FI_ACCOUNT | 100
178 | Kimberely | SA_REP | 0
200 | Jennifer | AD_ASST | 10
201 | Michael | MK_MAN | 20
202 | Pat | MK_REP | 20
203 | Susan | HR_REP | 40
204 | Hermann | PR_REP | 70
205 | Shelley | AC_MGR | 110
206 | William | AC_ACCOUNT | 110
(22 rows)
Code Explanation:
The said query in SQL that retrieves "employee_id", "first_name", "job_id", and "department_id" from a table named 'employees'. The query returns only the rows where the "department_id" is not equal to 50, 30, or 80.
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