diff --git a/sql/01-create-table-student.sql b/sql/01-create-table-student.sql
index dd66051..2638eac 100644
--- a/sql/01-create-table-student.sql
+++ b/sql/01-create-table-student.sql
@@ -1,23 +1,6 @@
-createdb sql-exercises;
-psql sql-exercises; --allows me to swithc in terminal
-create schema student; 
-	create table student.student (
-		id INT NOT NULL, first_name TEXT, grade INT
-		);
-	\d student.student; --allows me to see the table in terminal
-INSERT INTO student.student values (1510, 'Jordan', 9);
-INSERT INTO student.student values (1689, 'Gabriel', 9);
-INSERT INTO student.student values (1381, 'Tiffany', 9);
-INSERT INTO student.student values (1709, 'Cassandra', 9);
-INSERT INTO student.student values (1101, 'Haley', 10);
-INSERT INTO student.student values (1782, 'Andrew', 10);
-INSERT INTO student.student values (1468, 'Kris', 10);
-INSERT INTO student.student values (1641, 'Brittany', 10);
-INSERT INTO student.student values (1274, 'Alexis', 11);
-INSERT INTO student.student values (1316, 'Austin', 11);
-INSERT INTO student.student values (1911, 'Gabriel', 11);
-INSERT INTO student.student values (1501, 'Jessica', 11);
-INSERT INTO student.student values (1304, 'Jordan', 12);
-INSERT INTO student.student values (1025, 'John', 12);
-INSERT INTO student.student values (1934, 'Kyle', 12);
-INSERT INTO student.student values (1661, 'Logan', 12);
+DROP TABLE IF EXISTS student;
+CREATE TABLE student (
+	id SERIAL PRIMARY KEY, 
+	name VARCHAR(255), 
+	grade INTEGER
+);
\ No newline at end of file
diff --git a/sql/02-create-table-friend.sql b/sql/02-create-table-friend.sql
index e69de29..7b3bf77 100644
--- a/sql/02-create-table-friend.sql
+++ b/sql/02-create-table-friend.sql
@@ -0,0 +1,5 @@
+DROP TABLE IF EXISTS friend;
+CREATE TABLE friend (
+	id1 INTEGER REFERENCES student(id),
+	id2 INTEGER REFERENCES student(id),
+);
\ No newline at end of file
diff --git a/sql/03-create-table-like.sql b/sql/03-create-table-like.sql
index e69de29..fbfaa04 100644
--- a/sql/03-create-table-like.sql
+++ b/sql/03-create-table-like.sql
@@ -0,0 +1,5 @@
+DROP TABLE IF EXISTS student_like;
+CREATE TABLE student_like (
+	liker_id INTEGER REFERENCES student(id), 
+	likee_id INTEGER REFERENCES student(id),
+);
\ No newline at end of file
diff --git a/sql/04-load-table-student.sql b/sql/04-load-table-student.sql
index e69de29..2307a22 100644
--- a/sql/04-load-table-student.sql
+++ b/sql/04-load-table-student.sql
@@ -0,0 +1,16 @@
+INSERT INTO student VALUES (1510, 'Jordan', 9);
+INSERT INTO student VALUES (1689, 'Gabriel', 9);
+INSERT INTO student VALUES (1381, 'Tiffany', 9);
+INSERT INTO student VALUES (1709, 'Cassandra', 9);
+INSERT INTO student VALUES (1101, 'Haley', 10);
+INSERT INTO student VALUES (1782, 'Andrew', 10);
+INSERT INTO student VALUES (1468, 'Kris', 10);
+INSERT INTO student VALUES (1641, 'Brittany', 10);
+INSERT INTO student VALUES (1274, 'Alexis', 11);
+INSERT INTO student VALUES (1316, 'Austin', 11);
+INSERT INTO student VALUES (1911, 'Gabriel', 11);
+INSERT INTO student VALUES (1501, 'Jessica', 11);
+INSERT INTO student VALUES (1304, 'Jordan', 12);
+INSERT INTO student VALUES (1025, 'John', 12);
+INSERT INTO student VALUES (1934, 'Kyle', 12);
+INSERT INTO student VALUES (1661, 'Logan', 12);
\ No newline at end of file
diff --git a/sql/05-load-table-friend.sql b/sql/05-load-table-friend.sql
index e69de29..0c65314 100644
--- a/sql/05-load-table-friend.sql
+++ b/sql/05-load-table-friend.sql
@@ -0,0 +1,20 @@
+INSERT INTO friend VALUES (1510, 1381);
+INSERT INTO friend VALUES (1510, 1689);
+INSERT INTO friend VALUES (1689, 1709);
+INSERT INTO friend VALUES (1381, 1247);
+INSERT INTO friend VALUES (1709, 1247);
+INSERT INTO friend VALUES (1689, 1782);
+INSERT INTO friend VALUES (1782, 1468);
+INSERT INTO friend VALUES (1782, 1316);
+INSERT INTO friend VALUES (1782, 1304);
+INSERT INTO friend VALUES (1468, 1101);
+INSERT INTO friend VALUES (1468, 1641);
+INSERT INTO friend VALUES (1101, 1641);
+INSERT INTO friend VALUES (1247, 1911);
+INSERT INTO friend VALUES (1247, 1501);
+INSERT INTO friend VALUES (1911, 1501);
+INSERT INTO friend VALUES (1501, 1934);
+INSERT INTO friend VALUES (1316, 1934);
+INSERT INTO friend VALUES (1934, 1304);
+INSERT INTO friend VALUES (1304, 1661);
+INSERT INTO friend VALUES (1661, 1025);
\ No newline at end of file
diff --git a/sql/06-load-table-like.sql b/sql/06-load-table-like.sql
index e69de29..3fa2bcd 100644
--- a/sql/06-load-table-like.sql
+++ b/sql/06-load-table-like.sql
@@ -0,0 +1,10 @@
+INSERT INTO student_like VALUES (1689, 1709);
+INSERT INTO student_like VALUES (1709, 1689);
+INSERT INTO student_like VALUES (1782, 1709);
+INSERT INTO student_like VALUES (1911, 1247);
+INSERT INTO student_like VALUES (1247, 1468);
+INSERT INTO student_like VALUES (1641, 1468);
+INSERT INTO student_like VALUES (1316, 1304);
+INSERT INTO student_like VALUES (1501, 1934);
+INSERT INTO student_like VALUES (1934, 1501);
+INSERT INTO student_like VALUES (1025, 1101);
\ No newline at end of file
diff --git a/sql/07-query-friends-gabriel.sql b/sql/07-query-friends-gabriel.sql
index e69de29..72570fb 100644
--- a/sql/07-query-friends-gabriel.sql
+++ b/sql/07-query-friends-gabriel.sql
@@ -0,0 +1,13 @@
+SELECT 	
+	name 
+FROM 	
+	student.student
+JOIN 	
+	student.friend 
+ON 		
+	student.student.id = student.friend.id1
+WHERE 	
+	id2 = 1911 
+OR 
+	id2 = 1689;
+
diff --git a/sql/08-query-likes-grade-two-or-more.sql b/sql/08-query-likes-grade-two-or-more.sql
index e69de29..ca83918 100644
--- a/sql/08-query-likes-grade-two-or-more.sql
+++ b/sql/08-query-likes-grade-two-or-more.sql
@@ -0,0 +1,21 @@
+SELECT 
+	student_who_likes.name,
+	student_who_likes.grade,
+	student_who_is_liked.named
+	student_who_is_liked.grade
+FROM
+	student
+AS
+	student_who_likes
+JOIN
+	student_like
+ON
+	student_who_likes.id = student_like.liker_id
+JOIN
+	student
+AS 
+	student_who_is_liked
+ON
+	student_who_is_liked.id = student_like.likee_id
+WHERE
+	student_who_likes.grade - student_who_is_liked.grade >= 1;
\ No newline at end of file
diff --git a/sql/09-mutual-likes.sql b/sql/09-mutual-likes.sql
index e69de29..aca0d7a 100644
--- a/sql/09-mutual-likes.sql
+++ b/sql/09-mutual-likes.sql
@@ -0,0 +1,81 @@
+SELECT DISTINCT
+	student1.name,
+	student1.grade,
+	student2.name,
+	student2.grade
+FROM
+	student
+AS
+	student1
+JOIN
+	student_like
+ON
+	student1.id = student_like.liker_id
+JOIN
+	student
+AS
+	student2
+ON
+	student_like.likee_id = student2.id
+WHERE 
+	student1.id IN (
+		SELECT likee_id FROM student_like
+		)
+ORDER BY
+	student1.name;
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+SELECT 
+first_name, grade
+FROM 
+student
+JOIN 
+student_like
+AS
+a_student_who_likes_b_student
+ON 
+student.id = a_student_who_likes_b_student.liker_id
+JOIN 
+student_like
+AS
+b_student_who_likes_a_student
+ON
+student.id = a_student_who_likes_b_student.likee_id
+
+WHERE 
+(id 
+IN (SELECT 
+liker_id 
+FROM 
+student_like))
\ No newline at end of file
diff --git a/sql/10-not-liked.sql b/sql/10-not-liked.sql
index e69de29..3fd5a95 100644
--- a/sql/10-not-liked.sql
+++ b/sql/10-not-liked.sql
@@ -0,0 +1,16 @@
+SELECT 
+	name, grade
+FROM 
+	student
+WHERE 
+	(id NOT 
+IN (SELECT 
+	liker_id 
+FROM 
+	student_like))
+AND 
+	(id NOT 
+IN (SELECT 
+	likee_id 
+FROM 
+	student_like));
diff --git a/sql/11-liked-but-does-not-like.sql b/sql/11-liked-but-does-not-like.sql
index e69de29..0c60f54 100644
--- a/sql/11-liked-but-does-not-like.sql
+++ b/sql/11-liked-but-does-not-like.sql
@@ -0,0 +1,25 @@
+SELECT DISTINCT
+	student_a_who_likes_student_b.name,
+	student_a_who_likes_student_b.grade,
+	student_b_who_likes_no_one.name,
+	student_b_who_likes_no_one.grade
+FROM
+	student
+AS
+	student_a_who_likes_student_b
+JOIN
+	student_like
+ON
+	student_a_who_likes_student_b.id = student_like.liker_id
+JOIN
+	student
+AS
+	student_b_who_likes_no_one
+ON
+	student_like.likee_id = student_b_who_likes_no_one.id
+WHERE 
+	student_b_who_likes_no_one.id NOT IN (
+		SELECT liker_id FROM student_like
+		)
+ORDER BY
+	student_a_who_likes_student_b.name;
\ No newline at end of file
diff --git a/sql/12-find-friends-in-common.sql b/sql/12-find-friends-in-common.sql
index e69de29..ef295b5 100644
--- a/sql/12-find-friends-in-common.sql
+++ b/sql/12-find-friends-in-common.sql
@@ -0,0 +1,38 @@
+SELECT DISTINCT
+	student_a.name, 
+	student_a.grade,
+	student_b.name,  
+	student_b.grade,
+	student_c.name, 
+	student_c.grade
+FROM
+	student
+JOIN
+	student_like
+ON 
+	student.id = student_like.liker_id
+JOIN 
+	friend
+ON
+	student_like.likee_id = friend.id1
+JOIN
+	student
+AS 
+	student_a
+ON
+	student_a.id = student_like.liker_id
+JOIN
+	student
+AS 
+	student_b
+ON
+	student_b.id = student_like.likee_id
+JOIN
+	student
+AS
+	student_c
+ON
+	student_c.id = friend.id1
+ORDER BY
+	student_a.first_name
+LIMIT 2
diff --git a/sql/13-popular-students.sql b/sql/13-popular-students.sql
index e69de29..6bb5544 100644
--- a/sql/13-popular-students.sql
+++ b/sql/13-popular-students.sql
@@ -0,0 +1,12 @@
+SELECT 		
+	name 
+FROM 		
+	student.student_like
+JOIN 			
+	student.student
+ON 			
+	student.student.id = student.student_like.likee_id
+GROUP BY 	
+	name 
+HAVING		
+	count(likee_id) >= 2;
\ No newline at end of file