SQL query to generate the following output - sql

Question

Display user id, user name, total amount, amount to be paid after discount and give alias name as User_ID, user_name, Total_amount, Paid_amount. Display record in descending order by user id. Click on TABLE SHCEMA to get the table
This is the code I've written. But this is not showing the expected result:
SELECT
USERS.USER_ID AS User_ID,
NAME AS user_name,
(FARE * NO_SEATS) AS Total_amount
FROM
USERS
INNER JOIN
TICKETS ON USERS.USER_ID = TICKETS.USER_ID
INNER JOIN
PAYMENTS ON TICKETS.TICKET_ID = PAYMENTS.TICKET_ID
INNER JOIN
DISCOUNTS ON PAYMENTS.DISCOUNT_ID = DISCOUNTS.DISCOUNT_ID
GROUP BY
USERS.USER_ID, NAME, FARE, NO_SEATS
ORDER BY
USERS.USER_ID DESC;
This is the expected output:
USER_ID USER_NAME TOTAL_AMOUNT PAID_AMOUNT
----------------------------------------------
5 Krena 700 625
4 Johan 800 775
3 Ivan 3000 2900
1 John 4000 3950
1 John 4000 3950
1 John 2000 1900

Answer 1

This will work, try it
SELECT
USERS.USER_ID AS USER_ID,
USERS.NAME AS USER_NAME,
(TICKETS.FARE * TICKETS.NO_SEATS) AS TOTAL_AMOUNT,
(TICKETS.FARE * TICKETS.NO_SEATS - DISCOUNTS.DISCOUNT_AMOUNT) AS PAID_AMOUNT
FROM
USERS
INNER JOIN TICKETS
ON USERS.USER_ID=TICKETS.USER_ID
INNER JOIN PAYMENTS
ON TICKETS.TICKET_ID=PAYMENTS.TICKET_ID
INNER JOIN DISCOUNTS
ON PAYMENTS.DISCOUNT_ID=DISCOUNTS.DISCOUNT_ID
ORDER BY USERS.USER_ID DESC;

Answer 2

Try this code.
SELECT
USERS.USER_ID AS USER_ID,
USERS.NAME AS USER_NAME,
(TICKETS.FARE * TICKETS.NO_SEATS) AS TOTAL_AMOUNT,
(TICKETS.FARE * DISCOUNTS.DISCOUNT_AMOUNT) + TICKETS.FARE AS PAID_AMOUNT
FROM
USERS USERS
INNER JOIN TICKETS TICKETS
ON USERS.USER_ID=TICKETS.USER_ID
INNER JOIN PAYMENTS PAYMENTS
ON TICKETS.TICKET_ID=PAYMENTS.TICKET_ID
INNER JOIN DISCOUNTS DISCOUNTS
ON PAYMENTS.DISCOUNT_ID=DISCOUNTS.DISCOUNT_ID
ORDER BY USERS.USER_ID DESC;
I'm confused in your database structure if why is it in number datatype? you might want to change it to decimal if you want and make its length as (11,2) because i assume that your discount amount in your DISCOUNT table is in percentage right? Or just paste your sample database here so i can update my code.

Answer 3

if i had enough reputation, i would have written this as a comment (sigh):
u havent quite defined what ur expected results are.
i assume the following:
print the total sums for a user, both the Total_amount (ie. official price), Paid_amount (ie. after discounts), so it would include all the tickets and their payments.
i assume that the discount is a positive number to be deducted from the fair and is per 1 seat
then this should do the trick:
SELECT
USER_ID AS USER_ID,
NAME AS USER_NAME,
sum(FARE * NO_SEATS) AS TOTAL_AMOUNT,
sum((FARE - DISCOUNT_AMOUNT ) * NO_SEATS) AS PAID_AMOUNT
FROM USERS u
INNER JOIN TICKETS t
ON u.USER_ID=t.USER_ID
INNER JOIN PAYMENTS p
ON t.TICKET_ID=p.TICKET_ID
INNER JOIN DISCOUNTS d
ON p.DISCOUNT_ID=d.DISCOUNT_ID
group by USER_ID, name
ORDER BY USER_ID DESC;

Answer 4

This is the right answer for the question and would give the accurate output
SELECT User_ID, (select name from users u where t.user_id=u.user_id) as
user_name, ticket_id as Ticket_id, (no_seats*fare) as Total_amount,
((no_seats*fare)-(select discount_amount from discounts d
where d.discount_id=(select discount_id from payments p where t.Ticket_id=p.Ticket_id))) as Paid_amount
FROM tickets t ORDER BY User_ID desc;

Answer 5

Write a query to
display user id, user name, ticket id , total amount, amount to be
paid after discount and give alias name as User_ID, user_name,
Ticket_Id, Total_amount, Paid_amount. Display record in descending
order by user id.
Avoid duplicate records.
[Note : Total amount to be paid should be number of tickets * amount per ticket ]
this code runs 100%