PostgreSQL Update Table: Update the values of one or more column of a table against more than one criteria
4. Write a SQL statement to change the email column of employees table with 'not available' for those employees whose department_id is 80 and gets a commission is less than.20%.
Sample table: employees
Sample Solution:
Code:
UPDATE employees
SET email='not available'
WHERE department_id=80
AND commission_pct<.20;
Output:
See the result. Only the effected rows have been displayed.
postgres=# SELECT * postgres-# FROM employees postgres-# WHERE department_id=80 postgres-# AND email='not available' postgres-# AND commission_pct<.20; employee_id | first_name | last_name | email | phone_number | hire_date | job_id | salary | commission_pct | manager_id | department_id -------------+------------+-----------+---------------+--------------------+------------+--------+---------+----------------+------------+--------------- 155 | Oliver | Tuvault | not available | 011.44.1344.486508 | 1987-08-11 | SA_REP | 7000.00 | 0.15 | 145 | 80 163 | Danielle | Greene | not available | 011.44.1346.229268 | 1987-08-19 | SA_REP | 9500.00 | 0.15 | 147 | 80 164 | Mattea | Marvins | not available | 011.44.1346.329268 | 1987-08-20 | SA_REP | 7200.00 | 0.10 | 147 | 80 165 | David | Lee | not available | 011.44.1346.529268 | 1987-08-21 | SA_REP | 6800.00 | 0.10 | 147 | 80 166 | Sundar | Ande | not available | 011.44.1346.629268 | 1987-08-22 | SA_REP | 6400.00 | 0.10 | 147 | 80 167 | Amit | Banda | not available | 011.44.1346.729268 | 1987-08-23 | SA_REP | 6200.00 | 0.10 | 147 | 80 171 | William | Smith | not available | 011.44.1343.629268 | 1987-08-27 | SA_REP | 7400.00 | 0.15 | 148 | 80 172 | Elizabeth | Bates | not available | 011.44.1343.529268 | 1987-08-28 | SA_REP | 7300.00 | 0.15 | 148 | 80 173 | Sundita | Kumar | not available | 011.44.1343.329268 | 1987-08-29 | SA_REP | 6100.00 | 0.10 | 148 | 80 179 | Charles | Johnson | not available | 011.44.1644.429262 | 1987-09-04 | SA_REP | 6200.00 | 0.10 | 149 | 80 (10 rows)
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Previous: Write a SQL statement to change the email and commission_pct column of the employees table with 'not available' and 0.10 for those employees whose department_id is 110.
Next: Write a SQL statement to change the email column of the employees table with 'not available' for those employees who belongs to the 'Accounting' department.
What is the difficulty level of this exercise?
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