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Employee_Database_challenge.sql
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Employee_Database_challenge.sql
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--*Deliverable 1*
-- Create table: retirement_titles
SELECT e.emp_no,
e.first_name,
e.last_name,
ti.title,
ti.from_date,
ti.to_date
INTO retirement_titles
FROM employees as e
JOIN titles as ti
ON e.emp_no = ti.emp_no
WHERE e.birth_date BETWEEN '1952-01-01' AND '1955-12-31'
ORDER BY e.emp_no;
-- Export retirement_titles table
SELECT * FROM retirement_titles;
-- Create table: unique_titles
SELECT DISTINCT ON (rt.emp_no)
rt.emp_no,
rt.first_name,
rt.last_name,
rt.title
INTO unique_titles
FROM retirement_titles as rt
ORDER BY rt.emp_no, rt.to_date DESC;
-- Export unique_titles table
SELECT * FROM unique_titles;
-- Retrieve the number of employees by their most recent job title who are about to retire
SELECT count(emp_no),
title
INTO retiring_titles
FROM unique_titles
GROUP BY title
ORDER BY count(emp_no) DESC;
-- Export retiring_titles table
SELECT * FROM retiring_titles;
--*Deliverable 2*
-- Create mentorship_eligibility table
SELECT DISTINCT ON (e.emp_no)
e.emp_no,
e.first_name,
e.last_name,
e.birth_date,
de.from_date,
de.to_date,
ti.title
INTO mentorship_eligibilty
FROM employees as e
JOIN dept_employee as de
ON e.emp_no = de.emp_no
JOIN titles as ti
ON e.emp_no = ti.emp_no
WHERE (e.birth_date BETWEEN '1965-01-01' AND '1965-12-31')
AND de.to_date = '9999-01-01'
ORDER BY e.emp_no;
-- Create mentorship_eligibilty table
SELECT * FROM mentorship_eligibilty;