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
- Suppose you are a manufacturer of product ABC, which is composed of parts A, B, and C When a new product is created, the involved parts in table PART must be reduced. As such, when product ABC is created, PROD_QTY is increased by one, and the quantity of parts A, B, and C in table PART (i.e. PART_QTY) is reduced by one respectively. The database content is shown in the following tables. How many database requests can you identify when a product ABC is created? List all.arrow_forwardIn the original sample solution, a customer could only have one address. Review the finalized sample solution for the database design. How many addresses can be linked to a customer? a.) Unlimited b.) 1 c.) 2 d.) 4arrow_forwardThe three phases of database design are briefly discussed here.arrow_forward
- An index is an orderly arrangement used to logically access rows in a table. From a conceptual point of view, an index is composed of an index key and a set of pointers. In your opinion, explain the role indexes play in a relational database.arrow_forwardSubject: Database Write the SQL statement for the following tasks. 1. Create a database for a library name MY_LIBRARY 2. Based on the given details, write the statements to create the following tables (include constraints):arrow_forwardExplain the process of de-normalization and its use cases in database design.arrow_forward
- In a relational database, the size of a table may be reduced via a select operation by eliminating columns from the table that meet a set of predefined requirements.Is there a mistake in my understanding of this?arrow_forwardE-R diagrams or DBDL may show database structure. Why do you prefer this method?arrow_forwardHow do you determine the level of normalization required for a particular database design?arrow_forward
- Below given relations of a database are in First Normal Form (1* NF). Decompose (Split) the relations to Normalize in 2NF and 3NF. tbl_Project Project Code Project Name Project Manager Budget PC010 Reservation System Mr. Said HR System Attendance System Mr. Rajesh 25000 PC011 MS. Malak 32000 PC012 19000 tbl_Emp_Dept Project Code Emp No Emp Name Dept No Dept Name Hourly Pay PC010 S100 Ali Mohd. D03 Database 7.500 PC010 S101 Hamood D02 Testing 5.500 PC010 S102 Riyaz D01 IT 8.200 PC011 S103 Pavan D03 Database 6.500 PC011 S104 Basma D02 Testing 5.400 PC011 S115 Asaad D01 IT 7.900 PC012 S137 Fathima D03 Database 6.200 PC012 S218 Avinash D02 Testing 6.100 PC012 S109 Роja D01 IT 9.300arrow_forwardNormalization works through a series of stages called normal forms. For most purposes in business database design, the normalization process. stages are as high as you need to go in five two four threearrow_forwardScenario: The owner of Al Musana Hotel would like to have a database tables that will help him manage the clients and rooms in his building. He wants to record the information about his clients and its occupancy. The hotel has three different room types which are available for daily rent only. As the Database Designer, perform the following tasks to help the owner of the hotel: Create the CLIENTS table using the specification below: Table Name: CLIENTS Field Name/ Data Type column name Size Constraints CID Number 8 PRIMARY KEY CName Varchar2 25 NOT NULL Validate to accept Male or Female only Gender Varchar2 10 Address Varchar2 25 Contact Number 15 Стуре Varchar2 15arrow_forward
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