From 8f261c4133971503578c540df8e42af520507340 Mon Sep 17 00:00:00 2001
From: Sakshi Asati <sakshiasati51@gmail.com>
Date: Wed, 4 Jun 2025 00:29:18 -0600
Subject: [PATCH] Done SQL4

---
 FriendRequestsII.sql                          | 16 ++++++++++++
 LeagueStatistics.sql                          | 25 +++++++++++++++++++
 SalesPerson.sql                               | 10 ++++++++
 ...eniors-and-juniors-to-join-the-company.sql | 25 +++++++++++++++++++
 4 files changed, 76 insertions(+)
 create mode 100644 FriendRequestsII.sql
 create mode 100644 LeagueStatistics.sql
 create mode 100644 SalesPerson.sql
 create mode 100644 number-of-seniors-and-juniors-to-join-the-company.sql

diff --git a/FriendRequestsII.sql b/FriendRequestsII.sql
new file mode 100644
index 0000000..23c2083
--- /dev/null
+++ b/FriendRequestsII.sql
@@ -0,0 +1,16 @@
+WITH CTE AS (
+    SELECT requester_id AS id, 
+           (SELECT COUNT(*) FROM RequestAccepted WHERE id = requester_id OR id = accepter_id) AS num
+    FROM RequestAccepted
+
+    UNION
+
+    SELECT accepter_id AS id, 
+           (SELECT COUNT(*) FROM RequestAccepted WHERE id = requester_id OR id = accepter_id) AS num
+    FROM RequestAccepted
+)
+
+SELECT * 
+FROM CTE 
+ORDER BY num DESC 
+LIMIT 1;
diff --git a/LeagueStatistics.sql b/LeagueStatistics.sql
new file mode 100644
index 0000000..e18c81e
--- /dev/null
+++ b/LeagueStatistics.sql
@@ -0,0 +1,25 @@
+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 - c.g2) AS goal_diff
+FROM Teams t
+JOIN CTE c ON t.team_id = c.r1
+GROUP BY c.r1, t.team_name
+ORDER BY points DESC, goal_diff DESC, t.team_name;
diff --git a/SalesPerson.sql b/SalesPerson.sql
new file mode 100644
index 0000000..1303617
--- /dev/null
+++ b/SalesPerson.sql
@@ -0,0 +1,10 @@
+WITH CTE 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 CTE);
diff --git a/number-of-seniors-and-juniors-to-join-the-company.sql b/number-of-seniors-and-juniors-to-join-the-company.sql
new file mode 100644
index 0000000..feba92e
--- /dev/null
+++ b/number-of-seniors-and-juniors-to-join-the-company.sql
@@ -0,0 +1,25 @@
+# Write your MySQL query statement below
+WITH CTE AS (
+    SELECT 
+        employee_id, experience, 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
+  );