From 5b027729bd4da01b5e22b7a4733d0f5c5b84477f Mon Sep 17 00:00:00 2001
From: Kaustubhk28 <99148707+Kaustubhk28@users.noreply.github.com>
Date: Fri, 20 Dec 2024 19:48:41 -0500
Subject: [PATCH] Done SQL1

---
 SQL1.sql | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 SQL1.sql

diff --git a/SQL1.sql b/SQL1.sql
new file mode 100644
index 0000000..cf3b5a0
--- /dev/null
+++ b/SQL1.sql
@@ -0,0 +1,29 @@
+# Problem 1: Big Countries (https://leetcode.com/problems/big-countries/)
+# Write your MySQL query statement below
+SELECT name, population, area
+FROM World
+WHERE area >= 3000000 OR population >= 25000000;
+
+# Problem 2: Nth Highest Salary (https://leetcode.com/problems/nth-highest-salary/)
+# Write your MySQL query statement below
+CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
+BEGIN
+  RETURN (
+       # Write your MySQL query statement below.
+        WITH TEMP AS
+        (
+            SELECT id, salary, DENSE_RANK() OVER(ORDER BY salary DESC) AS ranks
+            FROM Employee
+        )
+        SELECT IFNULL(salary, null)
+        FROM TEMP
+        WHERE ranks = N
+  );
+END
+
+# Problem 3: Delete Duplicate Emails (https://leetcode.com/problems/delete-duplicate-emails/)
+# Write your MySQL query statement below
+DELETE p2
+FROM Person p1
+JOIN Person p2
+ON p1.email = p2.email AND p2.id > p1.id 
\ No newline at end of file