From ff618e10a2657f561ff0c15ecebb25b3edeb1a9a Mon Sep 17 00:00:00 2001
From: Arushi Bhambri <arushibhambri@Arushis-MacBook-Pro.local>
Date: Wed, 28 May 2025 15:38:42 -0700
Subject: [PATCH 1/6] Added Q1 SQL solution

---
 Q1_Solution.sql | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 Q1_Solution.sql

diff --git a/Q1_Solution.sql b/Q1_Solution.sql
new file mode 100644
index 0000000..d5eb053
--- /dev/null
+++ b/Q1_Solution.sql
@@ -0,0 +1,7 @@
+select 
+    name
+    , population
+    , area
+from 
+    World
+where (area >= 3000000) or (population >= 25000000)
\ No newline at end of file

From 48d229eb4012cd96e730421a06a9705cf7c3d197 Mon Sep 17 00:00:00 2001
From: Arushi Bhambri <arushibhambri@Arushis-MacBook-Pro.local>
Date: Wed, 28 May 2025 20:54:27 -0700
Subject: [PATCH 2/6] Added Q1 SQL solution

---
 SQL1_Q2_Question.sql | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 SQL1_Q2_Question.sql

diff --git a/SQL1_Q2_Question.sql b/SQL1_Q2_Question.sql
new file mode 100644
index 0000000..c3f66d0
--- /dev/null
+++ b/SQL1_Q2_Question.sql
@@ -0,0 +1,12 @@
+CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
+BEGIN
+  RETURN (
+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 c631e5c93a5b2dfb4f2102f3694d1a4875218718 Mon Sep 17 00:00:00 2001
From: Arushi Bhambri <arushibhambri@Arushis-MacBook-Pro.local>
Date: Wed, 28 May 2025 21:01:47 -0700
Subject: [PATCH 3/6] Added Q2 and Q3 SQL solutions

---
 Q3_Sql1_solution.sql | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 Q3_Sql1_solution.sql

diff --git a/Q3_Sql1_solution.sql b/Q3_Sql1_solution.sql
new file mode 100644
index 0000000..2b2d026
--- /dev/null
+++ b/Q3_Sql1_solution.sql
@@ -0,0 +1,15 @@
+with rank_email_duplicates as 
+(
+select 
+    id
+    , email
+    , row_number() over(partition by email order by id) as rownum
+from 
+    Person
+)
+select 
+    id 
+    , email
+from 
+    rank_email_duplicates
+where rownum = 1
\ No newline at end of file

From 0be5d56cb20b9f8f4804bde3dd0adcd3a101d02d Mon Sep 17 00:00:00 2001
From: Arushi Bhambri <arushibhambri@Arushis-MacBook-Pro.local>
Date: Fri, 30 May 2025 22:22:08 -0700
Subject: [PATCH 4/6] Sql1 Q2 DECLARE SET Method

---
 Q1_Solution_UsingDECLARE_SET | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 Q1_Solution_UsingDECLARE_SET

diff --git a/Q1_Solution_UsingDECLARE_SET b/Q1_Solution_UsingDECLARE_SET
new file mode 100644
index 0000000..06c69a4
--- /dev/null
+++ b/Q1_Solution_UsingDECLARE_SET
@@ -0,0 +1,14 @@
+CREATE FUNCTION GetNthHighestSalary(N INT) RETURNS INT
+BEGIN
+    DECLARE M INT 
+    SET M = N-1
+    RETURN 
+    (
+        select 
+            distinct salary
+        from 
+            Employee
+        order by desc
+        limit M, 1
+    );
+    END
\ No newline at end of file

From f77804cc752c5cd7bc92defdc8ced6d7b3779d32 Mon Sep 17 00:00:00 2001
From: Arushi Bhambri <arushibhambri@Arushis-MacBook-Pro.local>
Date: Fri, 30 May 2025 23:59:59 -0700
Subject: [PATCH 5/6] edited sql1_q3

---
 Q3_Sql1_solution.sql | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/Q3_Sql1_solution.sql b/Q3_Sql1_solution.sql
index 2b2d026..b7be626 100644
--- a/Q3_Sql1_solution.sql
+++ b/Q3_Sql1_solution.sql
@@ -1,15 +1,12 @@
-with rank_email_duplicates as 
+with ranked_emails as 
 (
-select 
-    id
-    , email
-    , row_number() over(partition by email order by id) as rownum
-from 
-    Person
+    select 
+        id
+        , email
+        , row_number() over(partition by email order by id) as rnk
+    from 
+        Person
 )
-select 
-    id 
-    , email
-from 
-    rank_email_duplicates
-where rownum = 1
\ No newline at end of file
+delete 
+from person p
+where p.id in (select ranked_emails.id from ranked_emails where rnk > 1)
\ No newline at end of file

From 39b4e380a13e5f8323cd68ebbc2e28f29c39b6b1 Mon Sep 17 00:00:00 2001
From: Arushi Bhambri <arushibhambri@Arushis-MacBook-Pro.local>
Date: Sat, 31 May 2025 00:07:29 -0700
Subject: [PATCH 6/6] Sql1 Q3 Cross Join solution

---
 sql1_q3_crossjoin | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 sql1_q3_crossjoin

diff --git a/sql1_q3_crossjoin b/sql1_q3_crossjoin
new file mode 100644
index 0000000..5ddc97b
--- /dev/null
+++ b/sql1_q3_crossjoin
@@ -0,0 +1,4 @@
+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