Task 3:The InstantRide Finance team wants to know the average discount amounts for each car in theInstantRide. Calculate the average discount amount as monetary value for the travels where adiscount is applied. You need to create a subquery over the TRAVELS table to retrieve CAR_IDand DISCOUNT_AMOUNT, calculated with 2 decimals using the ROUND function.To calculate the DISCOUNT_AMOUNT , multiply the TRAVEL PRICE by the TRAVEL_DISCOUNTwhere the TRAVEL_DISCOUNT value is not NULL. Round the result to 2 decimals.Then you can use this subquery to get the CAR_ID and AVG of DISCOUNT_AMOUNT values, onceagain using the ROUND function on the average results. Group the results by the CAR_ID. UseCAR ID and DISCOUNT_AMOUNT as column aliases and return it back to the Finance team.

The query for the above-given problem is given below.

Answered: The InstantRide Finance team wants to…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The InstantRide User Satisfaction team requires the average and maximum number of rides users have taken so far with InstantRide. In addition, they would like to know the total number of travels. However, they need these details with the corresponding column names Average, Maximum and Total by using the AVG, MAX and SUM functions. In order to accomplish this, you will first need to create a derived table from the TRAVELS table to pass the TRAVEL_ID count to the three mathematical functions.
Task 12: When deleting a customer, subtract the balance multiplied by the sales rep’s commission rate from the commission for the corresponding sales rep.
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The InstantRide Driver Relationship team wants to learn how many travels each driver has done in the month of October. You need to send them the DRIVER_ID, and two calculated columns: DAY and RIDES. The DAY column is calculated using the DAY() function with the TRAVEL_START_TIME as the argument. The RIDES column is calculated by using the COUNT() function to determine the number of rides given for each day. Filter the results with the MONTH function.
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