From 18afd35347c0efff324a87d8f7850d4772ab6892 Mon Sep 17 00:00:00 2001
From: Paneri Patel <paneripatel@Paneris-MacBook-Pro-6.local>
Date: Wed, 25 Jun 2025 15:33:45 -0400
Subject: [PATCH] Done Sql4

---
 FriendRequestsII.sql                           | 16 ++++++++++++++++
 LeagueStatistics.sql                           | 17 +++++++++++++++++
 SalesPerson.sql                                | 12 ++++++++++++
 ...mberOfSeniorsAndJuniorsToJoinTheCompany.sql | 18 ++++++++++++++++++
 4 files changed, 63 insertions(+)
 create mode 100644 FriendRequestsII.sql
 create mode 100644 LeagueStatistics.sql
 create mode 100644 SalesPerson.sql
 create mode 100644 TheNumberOfSeniorsAndJuniorsToJoinTheCompany.sql

diff --git a/FriendRequestsII.sql b/FriendRequestsII.sql
new file mode 100644
index 0000000..d55ec42
--- /dev/null
+++ b/FriendRequestsII.sql
@@ -0,0 +1,16 @@
+'''
+4 Problem 4 : Friend Requests II (https://leetcode.com/problems/friend-requests-ii-who-has-the-most-friends/ )
+'''
+
+WITH CTE AS (
+    SELECT requester_id AS id
+    FROM RequestAccepted
+    UNION ALL
+    SELECT accepter_id AS id
+    FROM RequestAccepted )
+
+SELECT id, COUNT(id) AS num
+FROM CTE
+GROUP BY id
+ORDER BY num DESC  
+LIMIT 1
\ No newline at end of file
diff --git a/LeagueStatistics.sql b/LeagueStatistics.sql
new file mode 100644
index 0000000..504bf1d
--- /dev/null
+++ b/LeagueStatistics.sql
@@ -0,0 +1,17 @@
+'''
+2 Problem 2 : League Statistics (https://leetcode.com/problems/league-statistics/ )
+'''
+
+WITH CTE AS (
+    SELECT home_team_id AS r1, away_team_id AS r2, home_team_goals AS g1, away_team_goals AS g2 FROM Matches
+    UNION ALL
+    SELECT away_team_id AS r1, home_team_id AS r2, away_team_goals AS g1, home_team_goals AS g2 FROM Matches )
+
+SELECT t.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 c.r1 ORDER BY points DESC, goal_diff DESC, t.team_name
\ No newline at end of file
diff --git a/SalesPerson.sql b/SalesPerson.sql
new file mode 100644
index 0000000..7e5a9c8
--- /dev/null
+++ b/SalesPerson.sql
@@ -0,0 +1,12 @@
+'''
+3 Problem 3 : Sales Person (https://leetcode.com/problems/sales-person/ )
+'''
+
+SELECT name
+FROM SalesPerson
+WHERE sales_id NOT IN (
+    SELECT sales_id
+    FROM Orders
+    JOIN Company ON Company.com_id = Orders.com_id
+    WHERE name = 'RED'
+)
\ No newline at end of file
diff --git a/TheNumberOfSeniorsAndJuniorsToJoinTheCompany.sql b/TheNumberOfSeniorsAndJuniorsToJoinTheCompany.sql
new file mode 100644
index 0000000..9296a87
--- /dev/null
+++ b/TheNumberOfSeniorsAndJuniorsToJoinTheCompany.sql
@@ -0,0 +1,18 @@
+'''
+Sql4
+
+1 Problem 1 : The Number of Seniors and Juniors to Join the Company (https://leetcode.com/problems/the-number-of-seniors-and-juniors-to-join-the-company/)
+'''
+
+WITH CTE AS (SELECT employee_id, experience, salary, 
+SUM(salary) OVER (PARTITION BY experience ORDER BY salary, employee_id)
+AS 'rsum' FROM Candidates)
+
+SELECT 'Senior' AS experience, COUNT(employee_id) AS accepted_candidates
+FROM CTE
+WHERE experience = 'Senior' AND rsum <= 70000
+UNION 
+SELECT 'Junior' AS experience, COUNT(employee_id) AS accepted_candidates
+FROM CTE
+WHERE experience = 'Junior' AND rsum <= (SELECT 70000 - IFNULL(MAX(rsum), 0) FROM CTE WHERE experience = 'Senior' AND rsum <= 70000)
+