sql4-PR

friend-request-ii

@@ -0,0 +1,12 @@
+WITH CTE AS 
+(select accepter_id as id ,count(*) as  no_of_time from RequestAccepted
+group by accepter_id
+union all 
+select requester_id as id ,count(*) as  no_of_time from RequestAccepted
+group by requester_id)
+
+SELECT ID,
+SUM(NO_OF_TIME) AS NUM 
+FROM CTE
+GROUP BY ID 
+ORDER BY NUM DESC LIMIT 1;

league-statistics

@@ -0,0 +1,26 @@
+with CTE AS (
+select home_team_id as r1,home_team_goals as g1,away_team_goals as g2 
+from 
+matches 
+union all
+select away_team_id as r1,away_team_goals as g1,home_team_goals g2 
+from 
+matches
+)
+select 
+t.team_name as team_name,
+count(c.r1) as matches_played,
+sum(case 
+when c.g1>c.g2 then 3
+when c.g1=c.g2 then 1
+else 0
+end) as points,
+sum(c.g1) as goal_for,
+sum(c.g2) as goal_against,
+sum(c.g1) - sum(c.g2) as goal_diff
+from teams t
+join 
+CTE c
+on t.team_id = c.r1
+group by t.team_id 
+order by points desc,goal_diff desc,team_name;

number-of-senior-junior

@@ -0,0 +1,11 @@
+with CTE1 AS (
+SELECT employee_id , experience,salary, sum(salary) over(partition by experience order by salary) cummulative_salary
+from candidates
+),
+CTE2 AS (
+SELECT coalesce(70000 - coalesce(max(cummulative_salary),0),0) remaining from CTE1 where cummulative_salary <70000 and experience='Senior'
+)
+
+select 'Senior' as experience,count(distinct employee_id) as accepted_candidates from CTE1 WHERE cummulative_salary <70000 and experience='Senior'
+union 
+select 'Junior' as experience ,count(distinct employee_id) as accepted_candidates from CTE1 WHERE experience='Junior' and cummulative_salary < (select remaining from CTE2);

sales-person

@@ -0,0 +1,8 @@
+WITH RED_SALES AS (
+select o.sales_id from 
+orders o 
+join company c
+on o.com_id = c.com_id
+where c.name='RED')
+SELECT NAME FROM SALESPERSON WHERE SALES_ID NOT IN (SELECT SALES_ID FROM RED_SALES);
+