StudentShare
Contact Us
Sign In / Sign Up for FREE
Search
Go to advanced search...
Free

Apply the process of normalization to third normal form in a multi-table entity-relationship - Essay Example

Cite this document
Summary
Functional dependence-This is where an attribute in a database relation uniquely determines another attribute in the database. That is, a condition where an attribute A functionally depends on B (ONeil, and ONeil, 2001).
5. Second normal form-A relationship is in second…
Download full paper File format: .doc, available for editing
GRAB THE BEST PAPER99% of users find it useful
Apply the process of normalization to third normal form in a multi-table entity-relationship
Read Text Preview

Extract of sample "Apply the process of normalization to third normal form in a multi-table entity-relationship"

Database Normalization Functional dependence-This is where an attribute in a database relation uniquely determines another attribute in the database. That is, a condition where an attribute A functionally depends on B (ONeil, and ONeil, 2001).2. Primary key-This refers to an attribute or a combination of attributes that are selected to provide a unique identification of an entity instance. 3. Candidate key-An attribute that provides unique identification of each row in a table but it does not contain any subset of attributes.

That is, candidate key is a minimal super key. 4. First normal form-In this form, each attribute domain in a relation has only atomic values that hold only a single value (Unique Identifier) from that domain (ONeil, and ONeil, 2001). 5. Second normal form-A relationship is in second normal form if and only if attribute domain has only atomic values that hold only a single value from that domain (it is in first normal form) and that all non-identifying attributes depend on the entity’s unique identifier.

That is, there are no partial dependencies allowed on keys.6. Problems would you find in tables that are not in second normal formA lot of data redundancy in tables and records (ONeil, and ONeil, 2001).Time wastage7. Third normal form-A relationship is in third normal form if and only if it is in second normal form with no non-identifying attributes that are depending on other non-identifying attributes. That is, in third normal form, a relationship does not allow transitive dependencies (ONeil, and ONeil, 2001). 8. Problems would you find in tables that are not in third normal formInconsistent data dependency in recordsPoor data availability to its users or programs9.

Functional dependencies in the table {PartNum, OnHand} Class Is full Functional dependency since neither PartNum Class nor Onhand Class holds.{PartNum, OnHand} >Description is partial functional dependency since OnHand > Description also holds.{OrderNum, NumOrdered} >QuotedPrice is a partial functional dependency since NumOrdered > QuotedPrice also holds.10. Conversion into third Normal form RepNumFirstNameLastNameReferencesONeil, P.

, & ONeil, E. (2001). Database: Principles, programming, performance. San Francisco, Calif. [u.a.: Morgan Kaufmann Retrieved from http://www.worldcat.org/title/database-principles-programming-performance/oclc/247056966

Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Apply the process of normalization to third normal form in a Essay”, n.d.)
Apply the process of normalization to third normal form in a Essay. Retrieved from https://studentshare.org/information-technology/1618018-apply-the-process-of-normalization-to-third-normal-form-in-a-multi-table-entity-relationship
(Apply the Process of Normalization to Third Normal Form in a Essay)
Apply the Process of Normalization to Third Normal Form in a Essay. https://studentshare.org/information-technology/1618018-apply-the-process-of-normalization-to-third-normal-form-in-a-multi-table-entity-relationship.
“Apply the Process of Normalization to Third Normal Form in a Essay”, n.d. https://studentshare.org/information-technology/1618018-apply-the-process-of-normalization-to-third-normal-form-in-a-multi-table-entity-relationship.
  • Cited: 0 times

CHECK THESE SAMPLES OF Apply the process of normalization to third normal form in a multi-table entity-relationship

Draw Entity Relation Database

Hint: 2nd normal form problemPart Number (PK)Warehouse (PK)LocationAt this point, the location attribute is dependent on the Warehouse (PK) only and not on Part Number (PK).... It also means that a non-prime attribute is dependent partially on the key attribute, which would fall under the second normal form.... After 2NF is normalization the relations would be as follows:Part Number (PK)Warehouse (PK)B) Given the following table, normalize to 3NF where PK=Primary Key and FK = Foreign Key....
1 Pages (250 words) Essay

Software Development Life Cycle Models

In this process, incremental development was introduced for both requirement capturing and for development, along with a clear validation at the end of every phase made this process more successful than the sequential SDLC.... This model, though under use in various unofficial forms across the developing community, became a standard process in 1991....
9 Pages (2250 words) Essay

Score Normalisation in Voice Biometrics

hellip; According to the findings, it can, therefore, be said that score normalization techniques are used to transform a system's output scores reducing misalignments, caused due to speaker-dependent or independent factors, such as test data conditions, training conditions, etc.... Bayesian method and standardization of score distributions are two score normalization methods.... Bayesian methods include cohort normalization, world model normalization, and unconstrained cohort normalization....
8 Pages (2000 words) Term Paper

Database Theory and Design

third normal form means we apply the rules for 2NF then we remove all transitive dependencies.... From our case we show how we applied normalization rule on the associative entity ASSIGNMENT below:JOB CLASSIFICATION – job-code, description, hourly-rate is 3NF (third normal form)ASSIGNMENT – client-id#, consultant-id#, start-date, work-hours, job-code, rate-per-hour is in 2NF (second normal form).... Therefore to make ASSIGNMENT into third normal form (3NF) we remove rate-per-hour from its attributes to end up with ASSIGNMENT – client-id#, consultant-id#, start-date, work-hours, job-code....
2 Pages (500 words) Coursework

Intro to Relat Dbase

third normal form (3NF).... “Basically, the normalization is the process of decomposing large, inefficiently structured tables into smaller, more efficiently structured tables without losing any data in this process” (Hernandez, 2003) Our database has the above given tables.... Hence, a query has to search INTRODUCTION TO RELATIONAL DATABASE Introduction to Relational Database Affiliation Normalization “Basically, the normalization is the process of decomposing large, inefficiently structured tables into smaller, more efficiently structured tables without losing any data in this process” (Hernandez, 2003)Step for converting database tables into First Normal From1st normal FormA relation is believed to be in 1st normal form if it does not contain any repeating group, the value in each attribute should be atomic, and every tuple should be unique (SQA, 2014):Steps performed in 1st Normal FormEliminate the repeating groups....
2 Pages (500 words) Assignment

ACID and Normalization

In this exercise, normalization of the database up to the third normal form is achieved.... The disadvantages of normalization include difficulty and increased costs required to implement, and extra skill requirement to offer functional views and maintain the database.... normalization is a method of reducing or removing data redundancies in the database.... Four goals are attained after normalization....
3 Pages (750 words) Assignment

NORMALIZATION AND SQL DDL STATEMENTS

Mostly, normalization till the third form is enough for most database system applications.... There are five normal forms of database; 1NF, 2NF, 3NF, BCNF and 4NF.... Employee (num,… The ACID model is a theoretical transactional model for database systems that puts forward the four goals (Atomicity, Consistency, Isolation and Durability) achieving which is essential for a database system to become a normalization and SQL DDL ments By: First Last 8th December Database from Module 3 The database before normalization is as follows....
2 Pages (500 words) Essay

Information System in Business

The author also gives a detailed information about the main components of SAP and the process of normalization of data storage… Open TEXT ECM solutions are one of the most prominent members of the vendor community that gives ECM solutions.... The author of the paper answers the questions about databases and about using a warehouse to consolidate heterogeneous data....
8 Pages (2000 words) Coursework
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Contact Us