Basic Database Design Concepts - 2587 Words

The Fundamentals of Database Design To end up with a good ‘relational database’ application, you need to ask: Do I actually need one? If so, how far do you want to take it? By this I mean, is this to be a simple database to store information about only one, or very few, related entities (i.e. a list of people who attended a certain event, and how they came to hear about the event) which are not likely to change; or a permanent and well used application with several different entities (i.e. Staff, Departments, Branches, SalesFigures for various periods/staff members/departments) which are constantly changing. If the forma is the case, a simple ‘Flat File’ database is all that is required. There are several basic database products on†¦show more content†¦This is extremely useful if the application is to be distributed among users and the database itself can be centrally stored and maintained by database specialists. The Development/Test db will be already in the correct format for the transfer to a backend server and the Access application will be ready to connect to it. Examine your current database There is no need to reinvent the wheel. If you have a current system, have a good look at your tables. If you need to make ‘sub-columns’, or the same data needs to be entered on many lines, the database is indeed set-up wrong. This is very often identified by spotting ‘repeating attributes’, within the same entity, or lists of values for one attribute. For example, you may have a table called StaffMembers with an attribute (a column heading) called ‘CompletedCourses’ where you need to list several courses for each staff member. To improve on this, the database needs to be ‘Normalised’, and probably redesigned. Design the database correctly from the outset The first thing you need to do is make a list of items you need to store information about. These are called Entities or Relations (or Classes in OOAD) Next you need to list all the things about each Relation that you need to record. These are the Relation’s Attributes (or the Class’ Properties in OOAD). For example, oneShow MoreRelatedData Warehousing Fundamentals For It Professionals1580 Words   |  7 Pagesthe design and implementations of database systems. Dr. Paulraj Ponniah has published few other successful books and, as Assistant Professor, he also continued teaching courses in college such as data warehousing and databases design. In addition to this book, he is also a renowned author of books based on the concepts such as Database Design and Development, Data Modelling Fundamentals, Database Design and Development: An Essential Guide for It Professionals with Visible Analyst Set,  Database DesignRead Moreâ€Å"Logical Design, Part 1† Essay1428 Words   |  6 Pagestwo to three page paper titled â€Å"Logical Design, Part 1† whereas I am a recently hired consultant for ACME Global Consulti ng to procure requirements for a large database. In this scenario, â€Å"Logical Design, Part 1†, I will develop a database management systems to convince a set of clients of the benefits of using the Entity–Relationship model (E-R) in developing a database. In addition, my management would like the following points addressed in my design: (1). List the advantages of a relationalRead MoreRelational Database Design And The No Sql Model As The Preferred Basis Of The New Application935 Words   |  4 Pagesof relational database design versus the no-SQL model as the preferred basis of the new application. The requirements to consider are: 1. Intensive Usage – Facebook has millions of users worldwide and produce billions of transactions. 2. Growth of the application is expected to be 10% per annum. 3.2 Definitions It is important to look at the key characteristics of these two different models in order to understand the conclusions of this report. 3.2.1 Relational Database Management SystemsRead MoreManaging Information Security Risks: The Octave Approach1635 Words   |  6 PagesAlberts, C. Dorofee, A.(2003) Managing Information Security Risks: The OCTAVE Approach. New York: Addison Wesley. This work is a descriptive and yet process-oriented book on the concept of security risk assessment with a specific focus on new risk evaluation methodology, OCTAVE. The term OCTAVE is used to denote f Operationally Critical Threat, Asset, and Vulnerability Evaluation SM.It is important that organizations conduct a security risk evaluation in order for them to effectively evaluateRead MoreAnchor modeling - Agile information modeling in evolving data environments (Rà ¶nnbà ¤ck and Regardt et1100 Words   |  5 Pagesfast adaption through extensions, and yields in older versions to be available as subset of the newest version. Even though this technique originates from data warehouse domain requirements it is to be considered as a â€Å"generic modeling approach†. The basic components defined for the anchor schema are: anchors, knots, attributes and ties. In order to preserve information on changes, knots and ties come also in â€Å"historized† versions. Furthermore, a specified naming convention and a set of five guidelinesRead MorePhases, Steps, Techniques, And Deliverables1333 Words   |  6 Pagesdetermining the organization’s objectives. This provides a general idea about shape of the new system. These are used as input to the design phase which refine them to produce a set of deliverables. These describes the detailed terms about how the system will be built. 3. Describe the principal steps in the planning phase. What are the major deliverables? This is the basic process of understanding the need of build the information system and determines how the team will build the system. ïÆ' ¼ Project InitiationRead MoreWhat is the Purpose of a Database Management System?1474 Words   |  6 PagesThe purpose of this paper is to explain what a Database Management System (DBMS) is, the main principles of database design and to describe the features or characteristics of four prevalent database models. What is a DBMS? A database management system could be described as a file processing system that creates and administers data and or objects as information for the purpose of access and storage in a convenient way. Many types of programs have been written to add and extract information fromRead MoreMicrosoft Visual Studio / Team Foundation Server952 Words   |  4 PagesOver 20 years of proven expertise in design, leading, development and delivery of highly scalable and stable systems, primarily on Windows platforms. Personal specialties and traits include: ï‚ § Architect, develop and deploy feature-rich and secured business process automation solutions that are highly configurable and easy to use. Most solutions implemented require very minimum subsequent updates and patches. ï‚ § Design, code and deliver user friendly multi-tier business intelligence solutions thatRead MoreTechnology Changes Role of Database Administrator1195 Words   |  5 PagesTechnology Changes Role of Database Administrator The database administrator (DBA) is responsible for managing and coordinating all database activities. The DBAs job description includes database design, user coordination, backup, recovery, overall performance, and database security. The database administrator plays a crucial role in managing data for the employer. In the past the DBA job has required sharp technical skills along with management ability. (Shelly, Cashman, Waggoner 1992)Read MoreAssignment 2 Database Management Systems1167 Words   |  5 PagesAssignment-2 Database Management Systems General Database Concepts 1. Describe the types of facility you would expect to be provided in a multi-user DBMS. Data Storage, Retrieval and Update. A User-Accessible Catalog. Transaction Support. Concurrency Control Services. Recovery Services. Authorization Services. Support for Data Communication. Integrity Services. Services to Promote Data Independence. Utility Services. 2