using oracle # SQL Query Exercise: Finding the Most Expensive Product by CompanyIn this exercise, you are tasked with writing an SQL query to identify the most expensive product offered by each company from the given tables. The required output should include the product name (`pro_name`), product price (`pro_price`), and company name (`com_name`).## Table Structures### company_mastThis table lists the details of companies.- **COM_ID**: Integer representing the company's unique identifier.- **COM_NAME**: Name of the company.#### Sample Data:```COM_ID COM_NAME----------------11 Samsung12 iBall13 Epson14 Zebronics15 Asus16 Frontech```### item_mastThis table contains details about the products.- **PRO_ID**: Product ID.- **PRO_NAME**: Name of the product.- **PRO_PRICE**: Price of the product.- **PRO_COM**: Reference ID to associate with a company.#### Sample Data:```PRO_ID PRO_NAME PRO_PRICE PRO_COM--------------------------------------------101 Mother Board 3200.00 15102 Key Board 450.00 16103 ZIP drive 250.00 12104 Speaker 250.00 16105 Monitor 5000.00 14106 DVD drive 2500.00 13107 CD drive 260.00 12108 Printer 2600.00 13109 Refill cartridge 350.00 13110 Mouse 250.00 12```### emp_departmentThis table provides information about different departments.- **DPT_CODE**: Department code.- **DPT_NAME**: Department name.- **DPT_ALLOTMENT**: Budget allotment for the department.#### Sample Data:```DPT_CODE DPT_NAME DPT_ALLOTMENT---------------------------------57 IT 6500063 Finance 1500047 HR 2400027 RD 5500089 QC 75000```### emp_detailsThis table includes employee details.- **EMP_IDNO**: Employee ID number.- **

In the given question there are 4 tables company_mast, item_mast, emp_department and emp_details.…

5- From the following tables write a SQL query to find the most expensive product of each company. Return pro_name, pro_price and com_name ? company_mast COM ID COM_NAME 11 Samsung 12 iBall 13 Epsion 14 Zebronics 15 Asus 16 Frontech item_mast PRO ID PRO_NAME 101 Mother Board 102 Key Board 103 ZIP drive 104 Speaker 105 Monitor 106 DVD drive 107 CD drive 108 Printer 109 Refill cartridge. 110 Mouse emp_department DPT_CODE DPT_NAME 57 IT 63 Finance 47 HR RD QC 27 89 EMP IDNO EMP FNAME 127323 Michale 526689 Carlos. 843795 Enric 328717 Jhon 444527 Joseph 659831 Zanifer 847674 Kuleswar 748681 Henrey 555935 Alex 539569 George 733843 Mario 631548 Alan 839139 Maria PRO_PRICE aid DPT ALLOTMENT ab 65000 15000 240000 55000 75000 EMP LNAME Robbin Snares Dosio Snares Dosni Emily Sitaraman Gabriel Manuel Mardy Saule Snappy Foster abah EMP DEPT 57 63 57 63 47 47 57 47 57 27 63 27 57

5- From the following tables write a SQL query to find the most expensive product of each company. Return pro_name, pro_price and com_name ? company_mast COM ID COM_NAME 11 Samsung 12 iBall 13 Epsion 14 Zebronics 15 Asus 16 Frontech item_mast PRO ID PRO_NAME 101 Mother Board 102 Key Board 103 ZIP drive 104 Speaker 105 Monitor 106 DVD drive 107 CD drive 108 Printer 109 Refill cartridge. 110 Mouse emp_department DPT_CODE DPT_NAME 57 IT 63 Finance 47 HR RD QC 27 89 EMP IDNO EMP FNAME 127323 Michale 526689 Carlos. 843795 Enric 328717 Jhon 444527 Joseph 659831 Zanifer 847674 Kuleswar 748681 Henrey 555935 Alex 539569 George 733843 Mario 631548 Alan 839139 Maria PRO_PRICE aid DPT ALLOTMENT ab 65000 15000 240000 55000 75000 EMP LNAME Robbin Snares Dosio Snares Dosni Emily Sitaraman Gabriel Manuel Mardy Saule Snappy Foster abah EMP DEPT 57 63 57 63 47 47 57 47 57 27 63 27 57

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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Concept explainers

Multiple Table

In a database, a table is used to store data in the form of rows and columns. Rows are aligned horizontally and identified by one or more values in a specific column. Columns are vertically aligned and identified by a unique column name.

Question

using oracle

# SQL Query Exercise: Finding the Most Expensive Product by Company

In this exercise, you are tasked with writing an SQL query to identify the most expensive product offered by each company from the given tables. The required output should include the product name (`pro_name`), product price (`pro_price`), and company name (`com_name`).

## Table Structures

### company_mast
This table lists the details of companies.

- **COM_ID**: Integer representing the company's unique identifier.
- **COM_NAME**: Name of the company.

#### Sample Data:
```
COM_ID COM_NAME
----------------
11 Samsung
12 iBall
13 Epson
14 Zebronics
15 Asus
16 Frontech
```

### item_mast
This table contains details about the products.

- **PRO_ID**: Product ID.
- **PRO_NAME**: Name of the product.
- **PRO_PRICE**: Price of the product.
- **PRO_COM**: Reference ID to associate with a company.

#### Sample Data:
```
PRO_ID PRO_NAME PRO_PRICE PRO_COM
--------------------------------------------
101 Mother Board 3200.00 15
102 Key Board 450.00 16
103 ZIP drive 250.00 12
104 Speaker 250.00 16
105 Monitor 5000.00 14
106 DVD drive 2500.00 13
107 CD drive 260.00 12
108 Printer 2600.00 13
109 Refill cartridge 350.00 13
110 Mouse 250.00 12
```

### emp_department
This table provides information about different departments.

- **DPT_CODE**: Department code.
- **DPT_NAME**: Department name.
- **DPT_ALLOTMENT**: Budget allotment for the department.

#### Sample Data:
```
DPT_CODE DPT_NAME DPT_ALLOTMENT
---------------------------------
57 IT 65000
63 Finance 15000
47 HR 24000
27 RD 55000
89 QC 75000
```

### emp_details
This table includes employee details.

- **EMP_IDNO**: Employee ID number.
- **

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