InstructionsUsing the data provided in the Ch13_SaleCo; database, solve the following problems.(Hint: In Problems 5–11, use the ROLLUP command.)Below is the Schema for the database:Problem 10What is the SQL command to list the number of product sales (number of rows) and total sales by month and product category, with subtotals by month and product category and a grand total for all sales? Figure P13.10 shows the result of the query. **Figure 13.20: SALECO Snowflake Schema**This diagram illustrates the SALECO snowflake schema used in data warehousing. Below is a detailed breakdown of each entity and its relationships:### Entities and Attributes:1. **DWREGION** - **Primary Key (PK):** REG_ID - **Attributes:** - REG_NAME2. **DWTIME** - **Primary Key (PK):** TM_ID - **Attributes:** - TM_YEAR - TM_MONTH - TM_DAY - TM_QTR3. **DWVENDOR** - **Primary Key (PK):** V_CODE - **Attributes:** - V_NAME - V_AREACODE - V_STATE4. **DWCUSTOMER** - **Primary Key (PK):** CUS_CODE - **Attributes:** - CUS_LNAME - CUS_FNAME - CUS_INITIAL - CUS_STATE - **Foreign Key (FK1):** REG_ID5. **DWPRODUCT** - **Primary Key (PK):** P_CODE - **Attributes:** - P_DESCRIPT - P_CATEGORY - **Foreign Key (FK1):** V_CODE6. **DWSALESFACT** - **Primary Keys (PK, FK2, FK1, FK3):** TM_ID, CUS_CODE, P_CODE - **Attributes:** - SALE_UNITS - SALE_PRICE### Relationships:- **DWREGION** is related to **DWCUSTOMER** via REG_ID.- **DWCUSTOMER**, **DWPRODUCT**, and **DWTIME** connect to **DWSALESFACT** through their respective foreign keys.- **DWVENDOR** is connected to **DWPRODUCT** with V_CODE acting as a foreign key in DWPRODUCT.The schema represents a more normalized variant of a star schema, with an emphasis on eliminating data redundancy by organizing data into multiple related tables. The table represents sales data categorized by month and product category. It contains four columns: TM_MONTH, P_CATEGORY, NUMPROD, and TOTSALES.**Columns Explained:**- **TM_MONTH**: Indicates the month number (9 or 10, with NULL representing an aggregate of all months).- **P_CATEGORY**: The product category, labeled as CAT1, CAT2, CAT3, CAT4, or NULL for uncategorized products.- **NUMPROD**: The number of products sold in the respective category and month.- **TOTSALES**: The total sales in monetary value for the products sold.**Data Analysis:**1. **For Month 9:** - Category CAT1 sold 8 products totaling $174.83. - Category CAT2 sold 4 products totaling $446.81. - Category CAT3 sold 5 products totaling $537.54. - Category CAT4 sold 6 products totaling $80.67. - Uncategorized products (NULL) accounted for 23 products and $1239.85.2. **For Month 10:** - Category CAT1 sold 4 products totaling $124.89. - Category CAT2 sold 2 products totaling $366.91. - Category CAT3 sold 3 products totaling $459.64. - Category CAT4 sold 4 products totaling $60.77. - Uncategorized products (NULL) accounted for 13 products and $1012.21.3. **Overall Totals:** - An overall number of 36 products recorded without specific categorization, totaling $2252.06.This data can be used to analyze trends in product sales over time and determine the most lucrative product categories.

SELECT T.TM_MONTH, P.P_CATEGORY, P.P_CODE, COUNT(*) AS NUMPROD, SUM(S.SALE_UNITS*S.SALE_PRICE) AS…

Answered: What is the SQL command to list the…

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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Instructions

Using the data provided in the Ch13_SaleCo; database, solve the following problems.
(Hint: In Problems 5–11, use the ROLLUP command.)

Below is the Schema for the database:

Problem 10

What is the SQL command to list the number of product sales (number of rows) and total sales by month and product category, with subtotals by month and product category and a grand total for all sales? Figure P13.10 shows the result of the query.

**Figure 13.20: SALECO Snowflake Schema**

This diagram illustrates the SALECO snowflake schema used in data warehousing. Below is a detailed breakdown of each entity and its relationships:

### Entities and Attributes:

1. **DWREGION**
- **Primary Key (PK):** REG_ID
- **Attributes:**
- REG_NAME

2. **DWTIME**
- **Primary Key (PK):** TM_ID
- **Attributes:**
- TM_YEAR
- TM_MONTH
- TM_DAY
- TM_QTR

3. **DWVENDOR**
- **Primary Key (PK):** V_CODE
- **Attributes:**
- V_NAME
- V_AREACODE
- V_STATE

4. **DWCUSTOMER**
- **Primary Key (PK):** CUS_CODE
- **Attributes:**
- CUS_LNAME
- CUS_FNAME
- CUS_INITIAL
- CUS_STATE
- **Foreign Key (FK1):** REG_ID

5. **DWPRODUCT**
- **Primary Key (PK):** P_CODE
- **Attributes:**
- P_DESCRIPT
- P_CATEGORY
- **Foreign Key (FK1):** V_CODE

6. **DWSALESFACT**
- **Primary Keys (PK, FK2, FK1, FK3):** TM_ID, CUS_CODE, P_CODE
- **Attributes:**
- SALE_UNITS
- SALE_PRICE

### Relationships:

- **DWREGION** is related to **DWCUSTOMER** via REG_ID.
- **DWCUSTOMER**, **DWPRODUCT**, and **DWTIME** connect to **DWSALESFACT** through their respective foreign keys.
- **DWVENDOR** is connected to **DWPRODUCT** with V_CODE acting as a foreign key in DWPRODUCT.

The schema represents a more normalized variant of a star schema, with an emphasis on eliminating data redundancy by organizing data into multiple related tables.

The table represents sales data categorized by month and product category. It contains four columns: TM_MONTH, P_CATEGORY, NUMPROD, and TOTSALES.

**Columns Explained:**

- **TM_MONTH**: Indicates the month number (9 or 10, with NULL representing an aggregate of all months).
- **P_CATEGORY**: The product category, labeled as CAT1, CAT2, CAT3, CAT4, or NULL for uncategorized products.
- **NUMPROD**: The number of products sold in the respective category and month.
- **TOTSALES**: The total sales in monetary value for the products sold.

**Data Analysis:**

1. **For Month 9:**
- Category CAT1 sold 8 products totaling $174.83.
- Category CAT2 sold 4 products totaling $446.81.
- Category CAT3 sold 5 products totaling $537.54.
- Category CAT4 sold 6 products totaling $80.67.
- Uncategorized products (NULL) accounted for 23 products and $1239.85.

2. **For Month 10:**
- Category CAT1 sold 4 products totaling $124.89.
- Category CAT2 sold 2 products totaling $366.91.
- Category CAT3 sold 3 products totaling $459.64.
- Category CAT4 sold 4 products totaling $60.77.
- Uncategorized products (NULL) accounted for 13 products and $1012.21.

3. **Overall Totals:**
- An overall number of 36 products recorded without specific categorization, totaling $2252.06.

This data can be used to analyze trends in product sales over time and determine the most lucrative product categories.

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