From 5c15b156967f8a6ffaf1fc0b17afb91820407d5a Mon Sep 17 00:00:00 2001
From: Sangeeth Santhosh <73825180+sangeeths29@users.noreply.github.com>
Date: Thu, 22 May 2025 11:02:19 -0400
Subject: [PATCH] Add files via upload

---
 problem1.sql |  7 +++++++
 problem2.sql |  9 +++++++++
 problem3.sql |  8 ++++++++
 problem4.sql | 13 +++++++++++++
 4 files changed, 37 insertions(+)
 create mode 100644 problem1.sql
 create mode 100644 problem2.sql
 create mode 100644 problem3.sql
 create mode 100644 problem4.sql

diff --git a/problem1.sql b/problem1.sql
new file mode 100644
index 0000000..4712c88
--- /dev/null
+++ b/problem1.sql
@@ -0,0 +1,7 @@
+# Write your MySQL query statement below
+SELECT s1.score, (
+    SELECT COUNT(DISTINCT s2.score)
+    FROM Scores s2
+    WHERE s2.score >= s1.score
+) AS 'rank' FROM Scores s1
+ORDER BY s1.score DESC;
\ No newline at end of file
diff --git a/problem2.sql b/problem2.sql
new file mode 100644
index 0000000..afc4d66
--- /dev/null
+++ b/problem2.sql
@@ -0,0 +1,9 @@
+# Write your MySQL query statement below
+SELECT 
+    CASE WHEN id % 2 = 0 THEN id - 1
+         WHEN id % 2 = 1 AND id + 1 <= (SELECT MAX(id) FROM Seat) THEN id + 1
+         ELSE id
+    END AS id,
+    student
+FROM Seat
+ORDER BY id;
diff --git a/problem3.sql b/problem3.sql
new file mode 100644
index 0000000..46a4d62
--- /dev/null
+++ b/problem3.sql
@@ -0,0 +1,8 @@
+# Write your MySQL query statement below
+SELECT id,
+CASE 
+    WHEN p_id IS null THEN 'Root'
+    WHEN id IN (SELECT p_id FROM Tree WHERE p_id IS NOT NULL) THEN 'Inner'
+    ELSE 'Leaf'
+END AS 'type'
+FROM Tree;
\ No newline at end of file
diff --git a/problem4.sql b/problem4.sql
new file mode 100644
index 0000000..754f94f
--- /dev/null
+++ b/problem4.sql
@@ -0,0 +1,13 @@
+# Write your MySQL query statement below
+WITH RankedSalaries AS (
+    SELECT 
+        d.name AS Department, 
+        e.name AS Employee, 
+        e.salary AS Salary,
+        DENSE_RANK() OVER(PARTITION BY e.departmentId ORDER BY e.salary DESC) AS salary_rank
+    FROM Department d
+    JOIN Employee e
+    ON d.id = e.departmentId)
+SELECT Department, Employee, Salary
+FROM RankedSalaries
+WHERE salary_rank <= 3;
\ No newline at end of file