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Conceptual Design
You have been asked to develop a data model for the Drip Drip Water Company (DDWC). DDWC is the sole supplier of water to the citizens and businesses of the town of Drip Drip.
Each of DDWC's customers is classified as being either residential or non-residential. Each customer may have a water meter that measures the water consumed by the customer at a particular service address. Customers may have more than one service address.
Water meters must be replaced when they have been in use for 5 years. We can assume that a meter will never be damaged or become unserviceable and will not be re-assigned to another service address.
Suppose Fred sees your RSA signature on m1 and m2, (i.e., he sees (m1d mod n) and (m2d mod n)). How does he compute the signature on each of m1j mod n (for positive integer j), m1-1 mod n, m1 x m2 mod n, and in general m1j m2k mod n (for arbitrary..
Your task is to develop a database to support this activity.Here is what you need to be able to provide Custom Auto Body in order to land your first consulting contract:
Create the DigitalX database. Design tables and relationships and ensure that email addresses may only be used once in the database.
Compute the numbers of married men, single men, married women and single women. Print these numbers on a student summary report.
Consider following opinion shared by some people: database management systems and data-warehousing techniques are the greatest threat to individual privacy in modern times. What is your opinion?
Provide an Entity Relationship Model (ERM) that will describe the data structure that will store all data elements and analyze the university's requirements and provide a proposal to organize all the required data elements.
These following questions require to you to create entities and their relationship using the Crow's Foot notation suitably.
Create an XML file that describes 3 product elements; each product has three sub-elements: id, name, and description.
Suppose a database has tables given below. Write the names and e-mail addresses for all customers who have had stove repair which cost more than $50.
Identify and discuss the serious data redundancy problems exhibited by the file structure shown in Figure and looking at the EMP_NAME and EMP_PHONE contents in Figure, what change(s) would you recommend?
Show all the data in each of the four tables. Do not show foreign key columns. Write names and e-mail addresses for all customers who have had a stove repair that cost more than $50.
Use Microsoft Access to develop preliminary (no keys and no relationships) database tables for Huffman Trucking Driver Log.
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