diff --git a/Probelm2.sql b/Probelm2.sql
new file mode 100644
index 0000000..36b5c85
--- /dev/null
+++ b/Probelm2.sql
@@ -0,0 +1,9 @@
+CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
+
+BEGIN
+    DECLARE M INT;
+    SET M= N-1;
+  RETURN (
+     SELECT DISTINCT salary FROM EMPLOYEE ORDER BY salary DESC LIMIT M,1
+  );
+END
\ No newline at end of file
diff --git a/Problem1.sql b/Problem1.sql
new file mode 100644
index 0000000..8c5c45a
--- /dev/null
+++ b/Problem1.sql
@@ -0,0 +1,2 @@
+select name, population , area from  World
+WHERE  population>= 25000000 OR area>=3000000 ;
\ No newline at end of file
diff --git a/Problem3.sql b/Problem3.sql
new file mode 100644
index 0000000..9016ff1
--- /dev/null
+++ b/Problem3.sql
@@ -0,0 +1,5 @@
+# Write your MySQL query statement below
+DELETE FROM Person
+WHERE id NOT IN (SELECT * FROM (SELECT MIN(id)
+FROM Person
+GROUP BY email) AS temp)
\ No newline at end of file