SQL Exercise: Find employees whose managers are hold given IDs
16. From the following table, write a SQL query to find the employees whose managers hold the ID 120, 103, or 145. Return first name, last name, email, salary and manager 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 'first_name', 'last_name', 'email', 'salary', and 'manager_id' columns
-- from the 'employees' table
SELECT first_name, last_name, email, salary, manager_id
-- Specifying the table to retrieve data from ('employees')
FROM employees
-- Filtering the results based on the condition that 'manager_id' is in the set (120, 103, 145)
WHERE manager_id IN (120, 103, 145);
Sample Output:
first_name | last_name | email | salary | manager_id -------------+-------------+----------+----------+------------ Bruce | Ernst | BERNST | 6000.00 | 103 David | Austin | DAUSTIN | 4800.00 | 103 Valli | Pataballa | VPATABAL | 4800.00 | 103 Diana | Lorentz | DLORENTZ | 4200.00 | 103 Julia | Nayer | JNAYER | 3200.00 | 120 Irene | Mikkilineni | IMIKKILI | 2700.00 | 120 James | Landry | JLANDRY | 2400.00 | 120 Steven | Markle | SMARKLE | 2200.00 | 120 Peter | Tucker | PTUCKER | 10000.00 | 145 David | Bernstein | DBERNSTE | 9500.00 | 145 Peter | Hall | PHALL | 9000.00 | 145 Christopher | Olsen | COLSEN | 8000.00 | 145 Nanette | Cambrault | NCAMBRAU | 7500.00 | 145 Oliver | Tuvault | OTUVAULT | 7000.00 | 145 Winston | Taylor | WTAYLOR | 3200.00 | 120 Jean | Fleaur | JFLEAUR | 3100.00 | 120 Martha | Sullivan | MSULLIVA | 2500.00 | 120 Girard | Geoni | GGEONI | 2800.00 | 120 (18 rows)
Code Explanation:
The said query in SQL that retrieves the first name, last name, email, salary, and manager ID columns from the 'employees' table where the value in the "manager_id" column is one of the following values: 120, 103, or 145.
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