Consider the following conceptual schema of an operational database owned by multinational real

estate company. The database contains information about the real estate properties offered for

sale, owners of properties, potential buyers who are interested in the properties and real estate

agents involved in selling of the properties.

Whenever a property is put on market by an owner, a description of the property is entered into an

operational database. Whenever a property is purchased, its description is removed from

operational database.

The real estate company would like to create a data warehouse to keep information about the

finalized real estate transactions, properties involved in the transaction, sellers$/$owners$,$ and agents

involved in the real estate transactions. The real estate company would like use a data warehouse to

implement following classes of analytical applications.

$1.$ Find the total number of real estate properties sold per month, along with information

about year, street, city country and agent involved.

$2.$ Find an average asked price of real estate properties sold per month, along with information

about year, street, city country and agent involved.

$3.$ Find an average final price of real estate properties sold per month, along with information

about year, street, city country and agent involved.

$4.$ Find an average period of time on the marked real estate properties sold per month, along

with information about year, street, city country and agent involved.

$5.$ Find the total number of times each real estate property has been sold in a given period of

time.

$6.$ Find the number of buyers interested in purchases of real estate properties sold per day,

month, along with information about year, street, city country and agent involved.

Question $1-$ Perform dimension modelling for above use case by explicitly performing following.

$1.$ Show fact and dimension tables along with required attributes for the same. $[5$ Marks$]$

$2.$ Call out explicitly Primary Key & Foreign key in each of the tables using acronyms as PK for

Primary Key and FK for Foreign Key. $[2$ Marks$]$

$3.$ Establish relationship between Fact and Dimension tables. $[2$ Marks$]$

$4.$ Data Modelling using: $[5$ Marks$]$

a$.$ Star Schema

b$.$ Snowflake Schema

Question $2$ Prepare a data pipe