Create employee.sql

Author: ankurbhambri

30_question/employee.sql

@@ -0,0 +1,28 @@
+
+-- Employee Table
+-- - id
+-- - first_name
+-- - last_name
+-- - salary
+-- - dept_id
+
+
+-- Departement
+-- - id
+-- - name
+
+
+-- Find top 3 dept , atleast 10 employees and rank them acc to % employees making 100000 in salary
+
+-- Output - %perc(10000000), deptname, nos_of_employees
+
+with cte as (
+    select e.*, d.name as dept_name rank() partition_by(d.dept_id order by e.salary desc) rnk
+    from employee e join Departement d on e.dept_id = d.dept_id
+)
+select
+    (count(case when salary >= 100000 then 1 else 0 end) * 100.0) / count(id) as '%perc_salary',
+    dept_name,
+    count(case when salary >= 100000 then 1 else 0 end) as no_of_employees
+from cte group by dept_id having rnk <= 3 and count(id) >= 10 order by '%perc_salary' desc
+