From 2a73933131bb0acccdead90bea0a12bb50320225 Mon Sep 17 00:00:00 2001
From: Sibabalwe <102536140+Ngandana@users.noreply.github.com>
Date: Wed, 20 Nov 2024 12:48:10 +0200
Subject: [PATCH] Update questions(my answers).sql

---
 SQL Deep Dive/Group By/questions.sql | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/SQL Deep Dive/Group By/questions.sql b/SQL Deep Dive/Group By/questions.sql
index cd0c9d5..a9c8b2e 100644
--- a/SQL Deep Dive/Group By/questions.sql	
+++ b/SQL Deep Dive/Group By/questions.sql	
@@ -4,22 +4,31 @@
 *  Table: Employees
 */
 
-SELECT e.emp_no
-FROM employees as e
+SELECT hire_date, COUNT(emp_no) as "amount"
+FROM employees
+GROUP BY hire_date
+ORDER BY "amount" DESC;
 
 /*
 *   Show me all the employees, hired after 1991 and count the amount of positions they've had
 *  Database: Employees
 */
 
-SELECT e.emp_no
+SELECT e.emp_no, COUNT(t.title) AS "No of title"
 FROM employees as e
+inner join titles as t on t.emp_no = e.emp_no
+WHERE EXTRACT(YEAR FROM hire_date) > 1991
+GROUP BY e.emp_no
+ORDER BY e.emp_no;
 
 
 /*
 *  Show me all the employees that work in the department development and the from and to date.
 *  Database: Employees
 */
-
-SELECT e.emp_no
+SELECT e.emp_no, de.from_date, de.to_date
 FROM employees as e
+JOIN dept_emp AS de USING(emp_no)
+WHERE de.dept_no = 'd005'
+GROUP BY e.emp_no, de.from_date, de.to_date
+ORDER BY e.emp_no, de.to_date;