From 4b23622cf4402fd53268ab07b7bf33303ce1f137 Mon Sep 17 00:00:00 2001
From: NehaDhaliwalNehaDhaliwal <dhaliwal_neha@yahoo.com>
Date: Thu, 29 May 2025 16:26:16 -0500
Subject: [PATCH] Done Sql1

---
 Problem 1.sql |  2 ++
 Problem 2.sql | 10 ++++++++++
 Problem 3.sql |  2 ++
 3 files changed, 14 insertions(+)
 create mode 100644 Problem 1.sql
 create mode 100644 Problem 2.sql
 create mode 100644 Problem 3.sql

diff --git a/Problem 1.sql b/Problem 1.sql
new file mode 100644
index 0000000..e4d08aa
--- /dev/null
+++ b/Problem 1.sql	
@@ -0,0 +1,2 @@
+select name, population, area from World
+where area >= 3000000 or population >= 25000000;
\ No newline at end of file
diff --git a/Problem 2.sql b/Problem 2.sql
new file mode 100644
index 0000000..42c5985
--- /dev/null
+++ b/Problem 2.sql	
@@ -0,0 +1,10 @@
+CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
+BEGIN
+  RETURN (
+      # Write your MySQL query statement below.
+    with cte as (
+        select *, dense_rank() over (order by salary desc) as rnk from Employee
+    )
+    select distinct ifnull(salary, null) from cte where rnk = N
+  );
+END
\ No newline at end of file
diff --git a/Problem 3.sql b/Problem 3.sql
new file mode 100644
index 0000000..9e51b82
--- /dev/null
+++ b/Problem 3.sql	
@@ -0,0 +1,2 @@
+delete p1 from Person p1 cross join Person p2
+where p1.email = p2.email and p1.id > p2.id
\ No newline at end of file