Due Date: November 28, 2019

Objective:
The objective of this assignment is to enhance the learning capabilities of the students about:
• De-Normalization
• Pre-Joining
• Storage Issues of Pre-joining

Instructions:
Please read the following instructions carefully before submitting assignment:
You need to use MS word document to prepare and submit the assignment on VU-LMS.
It should be clear that your assignment will not get any credit if:

 The assignment is submitted after due date.
 The assignment is not in the required format (.doc or docx)
 The submitted assignment does not open or file is corrupt.
 Assignment is copied (partial or full) from any source (websites, forums, students, etc)

Assignment

Question

“Kare Pharma” is an online Medical store currently acquiring a large number of customers. To manage some performance issues this online Medical store requires to de-normalize its database using pre-joining technique for Prescription and Prescription details tables.

Normalized table structures are given below:

Prescription Table

Prescription details Table

Table Information

• Assume 1:11 record count ratio between Prescription table as master table and Prescription details table for online Medical store’s database.
• Assume 10 million records in Prescription Table.
• Assume 10 bytes reserved for Prescription_ID in memory.
• Assume 40 bytes header for master table and 70 bytes header for details table.

Task

You are required to perform the following tasks:

1. Calculate the total space reserved in memory using normalization
2. Calculate the total space reserved in memory after de-normalization using pre-joining technique

Best of Luck!