SQL Exercise: List employees in ascending order on their experiences

Last update on December 20 2024 11:40:42 (UTC/GMT +8 hours)

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80. From the following table, write a SQL query to list the employee ID, name, hire date, current date and experience of the employees in ascending order on their experiences.

Pictorial Presentation:

Sample table: employees

Sample Solution:

SELECT emp_id,
       emp_name,
       hire_date,
       CURRENT_DATE,
       age(CURRENT_DATE, hire_date) EXP
FROM employees
ORDER BY EXP ASC;

Sample Output:

 emp_id | emp_name | hire_date  |    date    |           exp
--------+----------+------------+------------+-------------------------
  68736 | ADNRES   | 1997-05-23 | 2018-02-01 | 20 years 8 mons 9 days
  67858 | SCARLET  | 1997-04-19 | 2018-02-01 | 20 years 9 mons 12 days
  69324 | MARKER   | 1992-01-23 | 2018-02-01 | 26 years 9 days
  69062 | FRANK    | 1991-12-03 | 2018-02-01 | 26 years 1 mon 29 days
  69000 | JULIUS   | 1991-12-03 | 2018-02-01 | 26 years 1 mon 29 days
  68319 | KAYLING  | 1991-11-18 | 2018-02-01 | 26 years 2 mons 13 days
  66564 | MADDEN   | 1991-09-28 | 2018-02-01 | 26 years 4 mons 3 days
  68454 | TUCKER   | 1991-09-08 | 2018-02-01 | 26 years 4 mons 23 days
  67832 | CLARE    | 1991-06-09 | 2018-02-01 | 26 years 7 mons 22 days
  66928 | BLAZE    | 1991-05-01 | 2018-02-01 | 26 years 9 mons
  65646 | JONAS    | 1991-04-02 | 2018-02-01 | 26 years 9 mons 29 days
  65271 | WADE     | 1991-02-22 | 2018-02-01 | 26 years 11 mons 7 days
  64989 | ADELYN   | 1991-02-20 | 2018-02-01 | 26 years 11 mons 9 days
  63679 | SANDRINE | 1990-12-18 | 2018-02-01 | 27 years 1 mon 14 days
(14 rows)

Explanation:

The said query in SQL that selects the emp_id, emp_name, hire_date, CURRENT_DATE, and EXP columns for each employee in the employees table, sorted in ascending order by their years of experience.

The age() function calculates the difference in years between the hire_date and CURRENT_DATE and the resulting column is aliased as EXP.

Practice Online

Sample Database: employee

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Previous SQL Exercises: Employees work as SALESMEN, sorted by their salary.
Next SQL Exercise: Sort employees by designation, joining after 1991.