A database is a structure that is used to hold data and it referred as a systematic collection of data.
Table:
A table is a logical structure that represents an entity state. It is one of the components of database.
One-to-Many Relationship:
When one record in a database table is associated with more than one record in another table, the relationship between the two tables is referred as one to many relationship. It is also represented as1: M relationship. This is the opposite of many to one relationship.
Crow Foot ERD:
The Crow Foot ERD is an Entity Relationship Diagram which is used to represent the cardinalities present in the basic ER diagram. It is used to represent the relationships present between two tuples or tables present in the database.
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Chapter 3 Solutions
Database Systems: Design, Implementation, & Management
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- WRITE THE OF MYSQL IN PYTHON, JUST ANSWER THE 2ND QUESTION BY LOOKING AT THE FIRST QUESTION Create database and tables as given below by using Python. (a) Market database (b) Vendor: vendor id integer, vendor name varchar, license start date, license end date (c) Item:itemidinteger,itemnamevarchar,itemtypevarchar, previous price float, last sold date date (d) Auction: auction id integer, vendor id integer, item id integer, price float Choose primary and foreign keys depending on the relations in Market database design. Create arrays of at least 5 di↵erent records. Use these arrays to populate each table in the database.arrow_forwardIf a relational database can't allow many-to-many links, can you provide any examples? Let us know about them if you have any.arrow_forwardThe InstantRide Management team founded a new team for car maintenance. The new team is responsible for the small maintenance operations for the cars in the InstantRide system. The main idea is to take actions faster and minimize the time spent for the maintenance. Therefore, the Car Maintenance team wants to store MAINTENANCE_TYPE_ID (char(5)) and a MAINTENANCE_TYPE_DESCRIPTION (varchar(30)) in the database. Using MAINTENANCE_TYPE_ID as the PRIMARY KEY, create a new table, MAINTENANCE_TYPES, and send the table description with the column names and types to the Car Maintenance team.arrow_forward
- Create relational modelarrow_forwardYou are required to design and implement a database system for a pharmacy shop with only one branch. The following is the description from the manager, Mr. Seth Akoto. “here, medicines that require prescriptions are sold only to people that have prescriptions. It is the pharmacy attendant that serves customers when they enter the pharmacy. Usually, people walk in and either give the prescription or mention the medicine they wish to purchase. The worker then searches to see if the medicine is in stock. If in stock, worker accepts payment from customer and gives the medicine and a receipt to the customer. “ 1. Determine all the entities from the description given by Mr. Akoto. 2. Assuming Mr. Akoto only wants a database system that would keep records of medicine{name of medicine, amount in grams in stock} and purchases{medicine bought, amount in grams bought, who attended to customer, when it was sold, contact and name of customer that bought the medicine} a. Draw and ER diagram with…arrow_forwardSuppose you are asked to design a club database system based on the following information. Each student has a unique student id, a name, and an email; each club has a unique club id, a name, a contact telephone number, and has exactly one student as its president. Each student can serve as a president in at most one of the clubs, although he/she can be the members of several clubs. Clubs organize activities and students can participate in any of them. Each activity is described by a unique activity id, a place, a date, a time and those clubs that organize it. If an activity is organized by more than one club, different clubs might contribute different activity fees.QuestionDraw an E-R diagram for the system according to the above description.arrow_forward
- Give an example showing why you believe many-to-many connections are impossible in a relational database.arrow_forwardWRITE THE CODE OF MYSQL IN PYTHON Create database and tables as given below by using Python. (a) Market database (b) Vendor: vendor_id integer, vendor_name varchar, license_start date, license_end date (c) Item: item_id integer, item_name varchar, item_type varchar, previous_price float, last_sold_date date (d) Auction: auction_id integer, vendor_id integer, item_id integer, price float Choose primary and foreign keys depending on the relations in Market database design.arrow_forwardImagine a simple database storing information for students' grades. Design what this database might look like and provide a SQL query to return a list of the honor roll students (top 10%), sorted by their grade point average.arrow_forward
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