From 4b52a6f57f0830827b2ffac742e62ab9d3028124 Mon Sep 17 00:00:00 2001
From: SukeshSrinivas <123338848+SukeshSrinivas@users.noreply.github.com>
Date: Thu, 19 Dec 2024 08:04:49 +0530
Subject: [PATCH 1/4] Create BigCountries

Test
---
 BigCountries | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 BigCountries

diff --git a/BigCountries b/BigCountries
new file mode 100644
index 0000000..27fb771
--- /dev/null
+++ b/BigCountries
@@ -0,0 +1 @@
+SELECT * FROM Countries

From 461fe28bad7d489dfaca8bb9152a420406c6b82a Mon Sep 17 00:00:00 2001
From: SukeshSrinivas <sukeshks1994@gmail.com>
Date: Wed, 18 Dec 2024 20:49:09 -0600
Subject: [PATCH 2/4] Added Big Countries Solution

---
 BigCountries | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/BigCountries b/BigCountries
index 27fb771..d159deb 100644
--- a/BigCountries
+++ b/BigCountries
@@ -1 +1,2 @@
-SELECT * FROM Countries
+SELECT name, population, area FROM World
+WHERE area >=3000000 OR population >= 25000000

From 8078e83fa88178c2c83008b61fab816e5c18ea22 Mon Sep 17 00:00:00 2001
From: SukeshSrinivas <123338848+SukeshSrinivas@users.noreply.github.com>
Date: Thu, 19 Dec 2024 17:13:51 -0600
Subject: [PATCH 3/4] 2nd problem attempted on MSSQL with Dense Rank

---
 Problem2_NthHighestSalary.Sql | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 Problem2_NthHighestSalary.Sql

diff --git a/Problem2_NthHighestSalary.Sql b/Problem2_NthHighestSalary.Sql
new file mode 100644
index 0000000..6a52461
--- /dev/null
+++ b/Problem2_NthHighestSalary.Sql
@@ -0,0 +1,13 @@
+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

From a842b0a1dc979e8118fff7fac5554b2c6a745b8a Mon Sep 17 00:00:00 2001
From: SukeshSrinivas <123338848+SukeshSrinivas@users.noreply.github.com>
Date: Thu, 19 Dec 2024 17:43:34 -0600
Subject: [PATCH 4/4] Problem 3 completed Delete Duplicate Emails

---
 Problem3_DeleteDuplicateEmails.sql | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 Problem3_DeleteDuplicateEmails.sql

diff --git a/Problem3_DeleteDuplicateEmails.sql b/Problem3_DeleteDuplicateEmails.sql
new file mode 100644
index 0000000..b557a26
--- /dev/null
+++ b/Problem3_DeleteDuplicateEmails.sql
@@ -0,0 +1,6 @@
+# Write your MySQL query statement below
+DELETE FROM Person
+WHERE id IN(
+    SELECT id FROM
+    (SELECT *, ROW_NUMBER() OVER(PARTITION BY email ORDER BY id) AS Instances FROM Person )p
+    WHERE p.Instances>1)
\ No newline at end of file