Zomato is an Indian multinational restaurant aggregator and food delivery company founded in 2008. The platform allows users to explore a diverse range of restaurants, read and write reviews, view menus, and place food delivery orders. With a presence in over 23 countries, Zomato provides in-depth information on more than 1.4 million restaurants.

Problem

Here we are analysing zomato sales sample data using SQl

drop table if exists goldusers_signup;

CREATE TABLE goldusers_signup(userid integer,gold_signup_date date);

INSERT INTO goldusers_signup(userid,gold_signup_date)

VALUES (1,'09-22-2017'),

(3,'04-21-2017');

drop table if exists users;

CREATE TABLE users(userid integer,signup_date date);

INSERT INTO users(userid,signup_date)

VALUES (1,'09-02-2014'),

(2,'01-15-2015'),

(3,'04-11-2014');

drop table if exists sales;

CREATE TABLE sales(userid integer,created_date date,product_id integer);

INSERT INTO sales(userid,created_date,product_id)

VALUES (1,'04-19-2017',2),

(3,'12-18-2019',1),

(2,'07-20-2020',3),

(1,'10-23-2019',2),

(1,'03-19-2018',3),

(3,'12-20-2016',2),

(1,'11-09-2016',1),

(1,'05-20-2016',3),

(2,'09-24-2017',1),

(1,'03-11-2017',2),

(1,'03-11-2016',1),

(3,'11-10-2016',1),

(3,'12-07-2017',2),

(3,'12-15-2016',2),

(2,'11-08-2017',2),

(2,'09-10-2018',3);

drop table if exists product;

CREATE TABLE product(product_id integer,product_name text,price integer);

INSERT INTO product(product_id,product_name,price)

VALUES

(1,'p1',980),

(2,'p2',870),

(3,'p3',330);

select * from sales;

select * from product;

select * from goldusers_signup;

select * from users;

Solution

1. What is the total amount each customer spent on Zomato?

SELECT a.userid,SUM(b.price) FROM

sales a inner join product b ON

a.product_id = b.product_id

GROUP BY a.userid

2. how many days each customer visited Zomato?

SELECT userid, COUNT(DISTINCT created_date) AS distinct_days FROM sales

GROUP BY userid

3. What was the first product purchased by each customer?

SELECT * FROM

(SELECT *,RANK() OVER (PARTITION BY userid ORDER BY created_date) rnk FROM sales) a

WHERE rnk = 1

4. What is the most purchased item on the menu and how many times it was purchased by all customers?

SELECT TOP 1 product_id, COUNT(product_id) FROM sales

GROUP BY product_id

ORDER BY COUNT(product_id) DESC

Which item was the most popular for each customer?

SELECT * FROM(

SELECT *, RANK() OVER (PARTITION BY userid ORDER BY cnt DESC) rnk FROM

( SELECT userid,product_id,COUNT(product_id) cnt FROM sales GROUP BY userid,product_id)a)b

WHERE rnk=1

6. Which item was purchased first by the customer after they became a member?

SELECT * FROM

(SELECT c.*,RANK() OVER (PARTITION BY userid ORDER BY created_date ) rnk FROM

(SELECT a.userid,a.created_date,a.product_id,b.gold_signup_date FROM sales a INNER JOIN

goldusers_signup b ON a.userid = b.userid AND created_date >= gold_signup_date) c)d WHERE rnk =1;

7. Which item was purchased just before the customer became a member?

SELECT * FROM

(SELECT c.*,RANK() OVER (PARTITION BY userid ORDER BY created_date ) rnk FROM

(SELECT a.userid,a.created_date,a.product_id,b.gold_signup_date FROM sales a INNER JOIN

goldusers_signup b ON a.userid = b.userid AND created_date <= gold_signup_date) c)d WHERE rnk =1;

8. What is the total orders and amount spent for each member before they became a member?

SELECT userid,COUNT(created_date) order_purchased,SUM(price) total_amount_Apent FROM

(SELECT c.*,d.price FROM

(SELECT a.userid,a.created_date,a.product_id,b.gold_signup_date FROM sales a INNER JOIN

goldusers_signup b ON a.userid=b.userid AND created_date <= gold_signup_date) c INNER JOIN

product d ON c.product_id = d.product_id) e

GROUP BY userid;

9. If you are buying each product generates points for examples 5rs = 2 zomato point and each product

has different purchasing points for example for p1 5 Rs = 1 zomato point and p3 5Rs =1 zomato point

calculate points collected by each customers and for which product most points have been given till now

SELECT userid, SUM(total_points)*2.5 total_points_earned FROM

(SELECT e.*, amt/points total_points FROM

(SELECT d.*, CASE

WHEN product_id =1 THEN 5

WHEN product_id = 2 THEN 2

WHEN product_id = 3 THEN 5

ELSE 0

END AS points FROM

(SELECT c.userid,c.product_id,SUM(price) amt FROM

(SELECT a.*, b.price from sales a INNER JOIN product b ON a.product_id = b.product_id) c

GROUP BY userid, product_id )d)e)f GROUP BY userid;

10. In the first one year after a customer joins the gold program ( including their join date) irrespective of what the customer has purchased they earn 5 zomato points for every 10 rs spent who earned more 1 or 3 and what was their points earnings in their first year

SELECT c.*, d.price*0.5 Total_points_earned FROM

(SELECT a.userid,a.created_date,a.product_id,b.gold_signup_date FROM sales a INNER JOIN

goldusers_signup b ON a.userid= b.userid AND created_date >= gold_signup_date AND created_date < DATEADD(year,1,gold_signup_date))c

INNER JOIN product D ON c.product_id = d.product_id;

-- 11. Rank all transactions of the customers

SELECT *,

RANK() over (partition by userid order by created_date ) rnk

FROM sales;

12. Rank all transactions for each member whenever they are zomato gold members for every non-gold member transaction mark as na

SELECT

e.*,

CASE WHEN rnk = 0 THEN 'na' ELSE rnk END AS rnkk

from

(

SELECT

c.*,

CAST(

(

CASE WHEN gold_signup_date is null THEN 0 ELSE rank() over (

PARTITION BY userid

ORDER BY

created_date desc

) end

) as varchar

) as rnk

FROM

(

SELECT a.userid,

a.created_date,

a.product_id,

b.gold_signup_date

FROM

sales a

LEFT JOIN goldusers_signup b

on a.userid = b.userid

AND created_date >= gold_signup_date

) c

) e;

"Learning SQL through this project has been a transformative experience for me as a data analyst. The hands-on practice with real-world scenarios, such as calculating total customer spending, analyzing visit frequency, and identifying first purchases, has not only honed my SQL skills but also deepened my understanding of data insights crucial for effective decision-making in any analytical role."

SQL Project - Zomato Boosts Sales with Data Analysis Platform