Adds notes and code for index and window functions.

database/code/models.py

@@ -0,0 +1,40 @@
+from peewee import *
+database = MySQLDatabase('jedi_academy', **{'charset': 'utf8', 'sql_mode': 'PIPES_AS_CONCAT', 'use_unicode': True, 'user': 'root'})
+
+class UnknownField(object):
+    def __init__(self, *_, **__): pass
+
+class BaseModel(Model):
+    class Meta:
+        database = database
+
+class Instructors(BaseModel):
+    email = CharField()
+    first_name = CharField()
+    last_name = CharField()
+    phone = CharField(null=True)
+
+    class Meta:
+        table_name = 'instructors'
+
+class Batches(BaseModel):
+    description = CharField(null=True)
+    instructor = ForeignKeyField(column_name='instructor_id', field='id', model=Instructors, null=True)
+    name = CharField()
+    start_date = DateField()
+
+    class Meta:
+        table_name = 'batches'
+
+class Students(BaseModel):
+    address = CharField(null=True)
+    batch = ForeignKeyField(column_name='batch_id', field='id', model=Batches, null=True)
+    birth_date = DateField(null=True)
+    email = CharField()
+    first_name = CharField()
+    iq = IntegerField(null=True)
+    last_name = CharField()
+    phone = CharField(null=True)
+
+    class Meta:
+        table_name = 'students'