add SQL Queries for 15 questions

.gitignore

@@ -1,3 +1,4 @@
 **/__pycache__/
 __pycache__/
-.pytest_cache
+.pytest_cache
+venv/

data/question.py

@@ -10,14 +10,14 @@ def connect_db():
     port=5432,
     database="postgres",
     user="postgres",
-    password=password)
+    password="1234")
     return conn
-
+    
 
 def question_1_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT *FROM students WHERE age>22;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -27,7 +27,7 @@ def question_1_query():
 def question_2_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT * FROM courses WHERE category='Veritabanı';')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -37,7 +37,7 @@ def question_2_query():
 def question_3_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT * FROM students WHERE first_name LIKE 'A%';')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -47,7 +47,7 @@ def question_3_query():
 def question_4_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT * FROM courses WHERE course_name LIKE '%SQL%';')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -57,7 +57,7 @@ def question_4_query():
 def question_5_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT * FROM students WHERE age BETWEEN 22 AND 24 ;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -67,7 +67,7 @@ def question_5_query():
 def question_6_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT DISTINCT first_name, last_name ,s.student_id FROM students AS s JOIN enrollments AS e ON s.student_id=e.student_id ORDER BY s.student_id;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -77,17 +77,16 @@ def question_6_query():
 def question_7_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT c.course_name , COUNT (e.student_id) AS student_count FROM courses AS c JOIN enrollments AS e ON c.course_id=e.course_id WHERE category='Veritabanı' GROUP BY c.course_id ,c.course_name ORDER BY student_count;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
     return data
 
-
 def question_8_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT c.course_name , i.name AS instructor_name FROM courses AS c JOIN course_instructors AS ci ON c.course_id=ci.course_id JOIN instructors AS i ON i.instructor_id=ci.instructor_id ORDER BY c.course_id;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -97,7 +96,7 @@ def question_8_query():
 def question_9_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT *FROM students AS s LEFT JOIN enrollments AS e ON s.student_id=e.student_id WHERE e.student_id IS NULL;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -107,7 +106,7 @@ def question_9_query():
 def question_10_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT c.course_name ,AVG(s.age) AS avg_age FROM students AS s JOIN enrollments AS e ON s.student_id=e.student_id JOIN courses AS c ON c.course_id=e.course_id GROUP BY c.course_name ORDER BY c.course_name;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -117,7 +116,7 @@ def question_10_query():
 def question_11_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT s.first_name, s.last_name , COUNT(c.course_name) AS total_courses FROM students AS s JOIN enrollments AS e ON s.student_id= e.student_id JOIN courses AS c ON c.course_id=e.course_id GROUP BY s.first_name,s.last_name,s.student_id ORDER BY s.student_id;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -127,7 +126,7 @@ def question_11_query():
 def question_12_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT i.name AS instructor_name, COUNT(i.name) AS total_courses FROM courses AS c JOIN course_instructors AS ci ON c.course_id=ci.course_id JOIN instructors AS i ON i.instructor_id=ci.instructor_id GROUP BY i.name HAVING COUNT(i.name)>1;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -137,7 +136,7 @@ def question_12_query():
 def question_13_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT c.course_name , COUNT(DISTINCT s.student_id) AS unique_students FROM students AS s JOIN enrollments AS e ON s.student_id=e.student_id JOIN courses AS c ON c.course_id=e.course_id GROUP BY c.course_name ORDER BY course_name;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -147,7 +146,7 @@ def question_13_query():
 def question_14_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT s.first_name ,s.last_name  FROM students AS s JOIN enrollments AS e ON s.student_id=e.student_id JOIN courses AS c ON c.course_id=e.course_id WHERE c.course_name IN ("SQL Temelleri", "İleri SQL") GROUP BY s.first_name, s.last_name  HAVING COUNT(DISTINCT c.course_name)=2;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
@@ -157,8 +156,9 @@ def question_14_query():
 def question_15_query():
     connection = connect_db()
     cursor = connection.cursor()
-    cursor.execute('')
+    cursor.execute('SELECT s.first_name, s.last_name, c.course_name, i.name AS instructor_name, e.enrollment_date FROM students AS s JOIN enrollments AS e ON s.student_id = e.student_id JOIN courses AS c ON c.course_id = e.course_id JOIN course_instructors AS ci ON ci.course_id = c.course_id JOIN instructors AS i ON i.instructor_id = ci.instructor_id ORDER BY e.enrollment_id;')
     data = cursor.fetchall()
     cursor.close()
     connection.close()
-    return data
+    return data
+

scripts/init_db.py

@@ -5,7 +5,7 @@
     port=5432,
     database="postgres",
     user="postgres",
-    password="postgres"
+    password="1234"
 )
 cur = conn.cursor()
 

tests/test_question.py

@@ -215,7 +215,7 @@ def run_tests():
 
     url = "https://kaizu-api-8cd10af40cb3.herokuapp.com/projectLog"
     payload = {
-        "user_id": 34,
+        "user_id": 506,
         "project_id": 35,
         "user_score": user_score,
         "is_auto": False