PR5 Done

Average Salary Department vs Company.sql

@@ -0,0 +1,21 @@
+# Write your MySQL query statement below
+WITH CTE AS( 
+    SELECT s.id,s.employee_id,s.amount,s.pay_date,e.department_id, AVG(s.amount) OVER(PARTITION BY s.pay_date) AS 'company_avg', AVG(s.amount) OVER(PARTITION BY s.pay_date, e.department_id) AS 'dept_avg'
+    FROM salary s LEFT JOIN
+    Employee e
+    ON s.employee_id = e.employee_id
+    ORDER BY s.id
+)
+-- SELECT * FROM CTE
+
+SELECT DATE_FORMAT(pay_date, '%Y-%m')AS pay_month,department_id,
+CASE
+
+    WHEN dept_avg > company_avg THEN 'higher'
+    WHEN dept_avg < company_avg THEN 'lower'
+    ELSE 'same'
+END    
+ AS comparison
+ FROM CTE
+ GROUP BY department_id,pay_month
+ ORDER BY department_id

Game Play Analysis I.sql

@@ -0,0 +1,4 @@
+WITH CTE AS (SELECT player_id,event_date,  MIN(event_date) OVER (PARTITION BY player_id) AS 'first_login' from
+Activity)
+
+SELECT DISTINCT player_id, first_login FROM CTE

Report Contiguos Dates.sql

@@ -0,0 +1,21 @@
+
+WITH CTE AS(SELECT f.fail_date AS 'Date','failed' AS status, RANK() OVER (ORDER BY f.fail_date) AS 'rnk'  FROM Failed f
+WHERE YEAR(f.fail_date) = 2019
+UNION
+SELECT s.success_date AS 'Date','succeeded' AS status, RANK() OVER (ORDER BY s.success_date) AS 'rnk'  FROM Succeeded s
+WHERE YEAR(s.success_date) = 2019
+),
+-- SELECT * FROM CTE  ORDER BY Date
+
+
+CTE2 AS (
+SELECT *, ROW_NUMBER() OVER(ORDER BY c.Date ) AS 'row_id'FROM CTE c 
+ORDER BY c.Date
+)
+
+SELECT status AS 'period_state', MIN(Date) AS start_date, MAX(Date) AS end_date
+FROM CTE2
+GROUP BY status, (row_id - rnk)
+ORDER BY start_date
+
+

Students Report By Geography.sql

@@ -0,0 +1,27 @@
+WITH first AS (
+    SELECT name AS America, 
+           ROW_NUMBER() OVER (ORDER BY name) AS rnk
+    FROM Student
+    WHERE continent = 'America'
+),
+second AS (
+    SELECT name AS Asia, 
+           ROW_NUMBER() OVER (ORDER BY name) AS rnk
+    FROM Student
+    WHERE continent = 'Asia'
+),
+third AS (
+    SELECT name AS Europe, 
+           ROW_NUMBER() OVER (ORDER BY name) AS rnk
+    FROM Student
+    WHERE continent = 'Europe'
+)
+SELECT 
+    f.America,
+    s.Asia,
+    t.Europe
+FROM 
+    first f
+LEFT JOIN second s ON f.rnk = s.rnk
+LEFT JOIN third t ON f.rnk = t.rnk
+ORDER BY f.rnk;