Update laboratory2.sql

km52/Stetsenko_Vladyslav/export_csv.py

@@ -0,0 +1,40 @@
+import cx_Oracle
+import csv
+
+
+connstr = 'username/password@HOST:PORT/xe'
+conn = cx_Oracle.connect(connstr)
+cursor = conn.cursor()
+
+
+# query = """
+# 			SELECT 
+# 					hotel.hotel__name, tourist.tourist_first_name,
+# 					tourist.hotel_id,
+# 					tourist.tourist_id
+# 			FROM tourist JOIN hotel on tourist.hotel_id=hotel.hotel_id
+# 			"""
+# cursor.execute(query)
+# f = open('toursit_hotel.csv', 'w')
+# writer = csv.writer(f)
+# writer.writerow(["tourist_id", "tourist_name", "hotel_id", "hotel_name"])
+
+# for hotel_name, tourist_name, hotel_id, tourist_id in cursor:
+# 	writer.writerow([tourist_id, tourist_name, hotel_id, hotel_name])
+# f.close()
+
+
+query = "SELECT hotel_name, hotel_id FROM hotels"
+cursor.execute(query)
+for hotel_name, hotel_id in cursor:
+	f = open('hotels_'+ str(hotel_id)+".csv", 'w')
+	writer = csv.writer(file)
+	writer.writerow(["ID", hotel_id])
+	writer.writerow(["Name", hotel_name])
+	tourist_query = "SELECT tourist_id, tourist_name FROM tourists WHERE hotel_id={0}".format(hotel_id)
+	cursor.execute(tourist_query)
+	writer.writerow([])
+	writer.writerow(['tourist_id', 'tourist_name'])
+	for row in cursor:
+		writer.writerow(row)
+	f.close()

km52/Stetsenko_Vladyslav/import_csv.py

@@ -0,0 +1,62 @@
+#import pandas as pd
+import cx_Oracle
+import csv
+
+filename = ''
+connstr = 'username/password@HOST:PORT/xe'
+conn = cx_Oracle.connect(connstr)
+cursor = conn.cursor()
+
+insert_hotel_query = """
+		INSERT INTO hotels_copy
+		(
+			hotel_id,
+			hotel__name
+		)
+		VALUES
+		(
+			{0},
+			'{1}'
+		)
+	"""
+
+insert_tourist_query = """
+		INSERT INTO tourists_copy
+		(
+			tourist_id,
+			tourist_first_name,
+			hotel_id
+		)
+		VALUES
+		(
+			{0},
+			'{1}',
+			{2}
+		)
+	"""
+
+# d = pd.read_csv('toursit_hotel.csv', sep=',')
+# hotels_inserted = set()
+# for item in zip(d.tourist_id, d.tourist_name, d.hotel_id, d.hotel_name):
+# 	if not item[2] in hotels_inserted:
+# 		hotel_insert = insert_hotel_query.format(item[2], item[3])
+# 		cursor.execute(hotel_insert)
+# 		conn.commit()
+# 		hotels_inserted.add(item[2])
+# 	tourist_insert = insert_tourist_query.format(item[0], item[1], item[2])
+# 	cursor.execute(tourist_insert)
+# 	conn.commit()
+
+
+f = open(filename)
+reader = csv.reader(f)
+hotel_id = next(reader)[1]
+name = next(reader)[1]
+query = insert_hotel_query.format(hotel_id, name)
+cursor.execute(query)
+next(reader)
+next(reader)
+
+for item in reader:
+	cursor.execute(insert_tourist_query.format(*item))
+conn.commit()

km52/Stetsenko_Vladyslav/laboratory2.sql

@@ -1,2 +1,29 @@
--- LABORATORY WORK 2
--- BY Stetsenko_Vladyslav
+/*---------------------------------------------------------------------------
+1. Вивести ключ покупця та ключ продукту, за умови, що покупець ніколи не купляв даний продукт.
+
+---------------------------------------------------------------------------*/
+--Код відповідь:
+SELECT PRODUCTS.PROD_ID, CUSTOMERS.CUST_ID FROM (
+  CUSTOMERS JOIN ORDERS
+    ON ORDERS.CUST_ID=CUSTOMERS.CUST_ID JOIN ORDERITEMS
+        ON ORDERS.ORDER_NUM=ORDERITEMS.ORDER_NUM JOIN PRODUCTS
+            ON ORDERITEMS.PROD_ID=PRODUCTS.PROD_ID
+) WHERE ORDERS.ORDER_NUM is NULL
+;
+
+
+
+
+
+
+
+/*---------------------------------------------------------------------------
+2.  Вивести ключ постачальника, що працював з покупцем, що має найдорожче замовлення.
+
+---------------------------------------------------------------------------*/
+
+--Код відповідь:
+
+SELECT VENDORS.VEND_ID, MAX(ORDERITEMS.ITEM_PRICE) FROM PRODUCTS JOIN VENDORS 
+  ON PRODUCTS.VEND_ID=VENDORS.VEND_ID JOIN ORDERITEMS
+    ON ORDERITEMS.PROD_ID=PRODUCTS.PROD_ID GROUP BY VENDORS.VEND_ID;

km52/Stetsenko_Vladyslav/laboratory3.sql

@@ -1,2 +1,45 @@
--- LABORATORY WORK 3
--- BY Stetsenko_Vladyslav
+/*1. Написати PL/SQL код, що додає постачальників, щоб сумарна кількість усіх постачальників була 7. Ключі постачальників v1….vn. 
+Решта значень обов’язкових полів відповідає полям  постачальника з ключем BRS01.
+10 балів*/
+DECLARE 
+    vend_count NUMBER(1);
+    vend_name vendors.vend_name%TYPE;
+    ins_ord_count NUMBER(1);
+    vend_id customers.cust_id%TYPE := 1000000001
+BEGIN 
+    select count(*) into vend_count from VENDORS where vend_id = vend_id;
+    select vend_name into from VENDORS where vend_id = 'BRS01';
+    ins_ord_count := 7 - vend_count; 
+    IF vend_count < 7 THEN
+        FOR vend_id IN 1..ins_ord_count LOOP
+            INSERT INTO VENDORS VALUES(vend_id, vend_name);
+        END LOOP;    
+    END IF;
+END;
+
+/*2. Написати PL/SQL код, що по вказаному ключу замовника виводить у консоль його ключ та визначає  його статус.
+Якщо він зробив 3 замовлення - статус  = "3"
+Якщо він не зробив 3 замовлення - статус  = "no 3"
+Якщо він немає замовлення - статус  = "unknown*/
+
+
+
+/*3. Створити представлення та використати його у двох запитах:
+
+3.1. Скільки замовлень було зроблено покупцями з Германії.
+3.2. Вивести назву продукту, що продавався більше ніж у 3 різних замовленнях.
+6 балів.*/
+
+CREATE VIEW orders_view as 
+    SELECT PRODUCTS.PROD_NAME, ORDERS.ORDER_NUM, CUSTOMERS.CUST_COUNTRY FROM ORDERS JOIN CUSTOMERS ON ORDERS.CUST_ID = CUSTOMERS.CUST_ID
+    JOIN ORDERITEMS ON ORDERS.ORDER_NUM = ORDERITEMS.ORDER_NUM
+    JOIN PRODUCTS ON ORDERITEMS.PROD_ID = PRODUCTS.PROD_ID;
+
+SELECT COUNT(*) FROM orders_view WHERE CUST_COUNTRY = 'Германія';
+
+SELECT PROD_NAME FROM(
+    SELECT PROD_NAME, COUNT(ORDER_NUM) as order_count FROM orders_view GROUP BY PROD_NAME)
+    WHERE order_count > 2;
+
+
+

km52/Stetsenko_Vladyslav/laboratory4.sql

@@ -1,2 +1,33 @@
--- LABORATORY WORK 4
--- BY Stetsenko_Vladyslav
+CREATE TRIGGER hotel_created
+AFTER CREATE ON Hotel
+BEGIN
+INSERT INTO STAFF (country, city, name, hotel_id, description) VALUES ("UA", "BC", "Manangment", new.hotel_id, "Manangment");
+END
+
+CREATE TRIGGER raiting_changed
+AFTER UPDATE ON Hotel
+BEGIN
+IF old.rating>new.rating Then
+	DELETE FROM Tourist
+		WHERE Tourist.hotel_id=new.hotel_id;
+END IF
+END
+
+CREATE PROCEDURE get_staff_ingo(IN hotel_name varchar)
+DECLARE
+	staff_count number;
+	CURSOR c1
+	IS
+	  SELECT STAFF.country, STAFF.city, STAFF.description 
+	  FROM Hotel JOIN STAFF on Hotel.hotel_id=STAFF.hotel_id WHERE Hotel.name=hotel_name;
+BEGIN
+	SELECT count(STAFF.name) INTO staff_count 
+	  FROM Hotel JOIN STAFF on Hotel.hotel_id=STAFF.hotel_id WHERE Hotel.name=hotel_name;
+	dbms_output.putline(staff_count)
+	FOR record in c1 LOOP
+		dbms_output.putline(record.country)
+		dbms_output.putline(record.city)
+		dbms_output.putline(record.name)
+		dbms_output.putline(record.description)
+	END LOOP
+END

km52/Stetsenko_Vladyslav/laboratory5.sql

@@ -1,2 +1,37 @@
--- LABORATORY WORK 5
--- BY Stetsenko_Vladyslav
+CREATE function get_item_count(in vendor_id number)
+return number
+IS
+prod_count number;
+BEGIN
+SELECT COUNT(PROD_ID) into prod_count FROM Product where VEND_ID=VENDOR_ID;
+return prod_count;
+END
+
+CREATE Procedure get_vend_id(in vend_name varchar, out vendor_id number)
+BEGIN
+SELECT NVL(VEND_ID, 0) FROM Vendors Where VEND_NAME=vend_name;
+IF vendor_id==0
+Then
+raise_application_error(-2001, "Vendor doesnt exist");
+END
+END
+
+CREATE Procedute update_price(in price number, in product_id number)
+IS 
+prod_exist number;
+order_exist number;
+BEGIN
+Select NVL(prod_id, 0) into prod_exist FROM Products Where prod_id=product_id;
+if prod_exist==0
+then
+raise_application_error(-2002, "Product does not exist")
+END
+SELECT NVL(ORDER_NUM, 0) into ored_exist From OrderItems Where PROD_ID=product_id;
+if order_exist
+then
+raise_application_error(-2002, "For this product exists order")
+END
+update Product
+set PROD_PRICE=price
+where PROD_ID=product_id
+END

km52/Stetsenko_Vladyslav/vizualization.py

@@ -0,0 +1,118 @@
+import cx_Oracle
+import plotly.plotly as py
+import plotly.graph_objs as go
+from plotly.tools import set_credentials_file
+
+
+class Vizualizator:
+	def __init__(self, username, api_key):
+		set_credentials_file(username=username, api_key=api_key)
+
+	@staticmethod
+	def bar(x, y, x_title, y_title, main_title, filename):
+		data = [go.Bar(
+		            x=x,
+		            y=y
+		    )]
+		layout = go.Layout(
+		    title=main_title,
+		    xaxis=dict(
+		        title=x_title,
+		        titlefont=dict(
+		            family='Courier New, monospace',
+		            size=18,
+		            color='#7f7f7f'
+		        )
+		    ),
+		    yaxis=dict(
+		        title=y_title,
+		        rangemode='nonnegative',
+		        autorange=True,
+		        titlefont=dict(
+		            family='Courier New, monospace',
+		            size=18,
+		            color='#7f7f7f'
+		        )
+		    )
+		)
+		fig = go.Figure(data=data, layout=layout)
+		py.plot(fig, filename=filename)
+
+	@staticmethod
+	def pie(labels, values, filename):
+		pie = go.Pie(labels=labels, values=values)
+		py.plot([pie], filename=filename)
+
+
+class DB_Wrapper:
+	def __init__(self, db_port, db_host, username, password, db):
+		connstr = '{0}/{1}@{2}:{3}/{4}'.format(username, password, db_host, db_port, db)
+		self.conn = cx_Oracle.connect(connstr)
+		self.cursor = self.conn.cursor()
+
+	def get_tourists_per_date(self):
+		query = """
+			SELECT tourist.vacation_from, COUNT(tourist.tourist_id) as tourists
+			FROM tourist
+				GROUP BY tourist.vacation_from ORDER BY COUNT(tourist.vacation_from)
+			"""
+		dates = []
+		tourists = []
+		self.cursor.execute(query)
+		for date, count in self.cursor:
+			dates.append(date)
+			tourists.append(count)
+		return (dates, tourists)
+
+	def get_tourists_count_per_hotel(self):
+		query = """
+			SELECT hotel.hotel__name, COUNT(tourist.hotel_id) as tourists
+			FROM tourist JOIN hotel on tourist.hotel_id=hotel.hotel_id
+				GROUP BY hotel.hotel__name ORDER BY COUNT(tourist.hotel_id)
+			"""
+		hotels = []
+		tourists = []
+		self.cursor.execute(query)
+		for name, count in self.cursor:
+			hotels.append(name)
+			tourists.append(count)
+		return (hotels, tourists)
+
+
+if __name__ == '__main__':
+	db_client = DB_Wrapper(
+			username='username',
+			password='password',
+			db='db_name',
+			db_host='127.0.0.1',
+			db_port=1521
+		)
+	vizualizator = Vizualizator(username='username', api_key='api_key')
+	x, y = db_client.get_tourists_per_date()
+	data = {
+			'x': x,
+			'y': y,
+			"main_title": "Tourists per date",
+			"x_title": "Dates",
+			"y_title": "Tourists count",
+			"filename": "hotels-date-tourists-count"
+		}
+	vizualizator.bar(**data)
+
+	x, y = db_client.get_tourists_count_per_hotel()
+	data = {
+			'x': x,
+			'y': y,
+			"main_title": "Tourists per hotel",
+			"x_title": "Hotels",
+			"y_title": "Tourists count",
+			"filename": "hotels-tourists-count"
+		}
+	vizualizator.bar(**data)
+
+	data = {
+		"filename": "hotels-tourists-sum",
+		"labels": x,
+		"values": y
+	}
+	vizualizator.pie(**data)