Database Models: Flat Files and the Relational Database

Database Models Flat Files And The Relational Database-ppt Download

  • Date:09 Jul 2020
  • Views:30
  • Downloads:0
  • Size:34.50 KB

Share Presentation : Database Models Flat Files And The Relational Database

Download and Preview : Database Models Flat Files And The Relational Database

Report CopyRight/DMCA Form For : Database Models Flat Files And The Relational Database


Database Models Flat Filesand the Relational DatabaseObjectives Understand the fundamental structureof the relational database model.
Learn the circumstances under whichit is a better choice than the flat file What is a database Structured Data Procedures for.
Data entry Storage Validity checking Sorting Selection.
Reporting Why use a database To organize preserve data To facilitate analysis and modeling To gain insights into the relationships in.
To help turn data into information To explore data using exploratorytechniques To support the organization Flat file databases.
Text files word processing packages Loosely structured storage Sorting whole tables or individualcolumns by number data text Reports via mail and merging functions .
Excel as a database All Word database capabilities plus Data entry Selection Queries Statistics.
Calculations Graphics chart development datasummarization Relational Database Systems All the features support by Excel.
Plus all of the following features Validity Checking Relational queries Extensive import export capabilities Object oriented model.
Strong data typing support for formatted text memo fields OLE calculated fields Why use the relational model Minimize redundancy Minimize wasted storage.
Facilitate updates appending new data toexisting systems Facilitate queries makes asking questionsof the database easier Keeps tables small for portability and.
improved data processing Things to be cautious about Issues and Design considerations Boolean Integer Long Currency Single Double Date String and Variant.
How expressions with different data types are When to split entries between different fieldsand when to combine them in a common field When to use more than one table in a database and when to use only one table.
Other things to consider Redundancy unnecessary repetition ofinformation wastes computing resources One to one relationships One to many relationships.
Many to many relationships special case Databases are dynamic Can accept entry of new data even whiledisplaying results from current data Desktop vs Client Server.
Transaction databases Internet databases Timber Stand InventoryCompartment Stand Origin Watershed ELTP63 184 1889 Dry Gulch 26.
78 200 1967 Dead Horse 18210 24 1942 Whitefish 45Information in each column are the attributes of the database information ineach row are records How to design a relational.
Identify the purpose of the relational database Identify the various the subjects of the database Determine what information on each subject is Determine how the subject information isrelated to other subject information.
Refine and redesign the database when designflaws are identified Final designs are seldom thefirst designs considered Tall Timbers Forest Management Inc Tables.
Forest communities Harvest schedules Prescribed burn schedule Wildlife habitat quality Riparian management objectives.
Restoration plans Special concerns for threatened and endangeredDatabase Models: Flat Files and the Relational Database Objectives: Understand the fundamental structure of the relational database model Learn the circumstances under which it is a better choice than the flat file

Related Presentations

The World Is Flat shelmi files wordpress com

The World Is Flat Syafrizal Helmi Perkembangan Globalisasi Globalisasi 1.0 : Mengglobalnya Negara Globalisasi 2.0 : Mengglobalnya Perusahaan-perusahaan Globalisasi 3.0 : Mengglobalnya individu Globalisasi 1.0 Negara-negara mulai ekspansi ke negara lain untuk mencari sumber-sumber ekonomi seperti rempah, hal ini ditandai dengan pelayaran-pelayaran seperti colombus, vasco de gama dll Globalisasi ...

16 Views0 Downloads

Flat Panel Displays Principles Materials and Processes

Flat Panel Displays --- Principles, Materials and Processes Jing Zhang 04/06/2004 Outline CRT (Cathode Ray Tube) Displays Flat Panel Displays - Classification; - Liquid Crystal Displays; - Basic Principles; - Addressing Issues; - Modified LCD - Field Emission Displays; Conclusions CRT CRT lives on: 50s – VS EL; 60s – VS Plasma panels; now – VS LCD.

9 Views0 Downloads


FLAT STANLEY ADVENTURES. Ben Conken. Mrs. Taylor. 4th Grade. LITTLE ROCK, ARKANSAS. Flat Stanley started his adventure at the Capitol building in Little Rock, Arkansas. The Arkansas State Capitol was constructed between 1899 and 1915 on the site of the old state penitentiary. They used prisoners to build the capital building.

24 Views0 Downloads

The World is Flat Pengaruh TI Terhadap Kehidupan Manusia

Kemana perkembangan TIK selanjutnya akan melangkah? Manfaat TIK (general purposes technology), a.l.: Menjadikan proses komunikasi lebih mudah, cepat dan murah. Membuat banyak perusahaan dan instansi bekerja dengan lebih efisien, sehingga dapat memacu produktivitas dan meningkatkan keuntungan.

19 Views0 Downloads

The Outcasts of Poker Flat By Bret Harte

". . .the party soon passed out of the moist, temperate regions of the foot-hills, into the dry, cold bracing air of the Sierras." Local Color A subdivision of Realism, local color writing attempts to portray accurate dialectpatterns, speech, mannerisms, thought, and topography of a specific region.

9 Views0 Downloads

Flat Rock Middle School Winston Salem Forsyth County Schools

Some of the After School Clubs and Activities at FRMS. Intramural and Intermural Sports. Yearbook. Future Business Leaders of America. Outdoor Classroom. Homework Center. Reading and Language Arts Tutorial. Student Council. Art Club. Clay Club. Chess Club. Step Team. Friends of Rachel Club. See you at Open House on Tuesday, August 18th for more ...

7 Views0 Downloads

Mise au point moteur flat twin bmw gsfr info

Mise au point moteur flat twin bmw ... Tige de culbuteur Culbuteur Axe de rotation du culbuteur Sens ou est poussé en latéral le culbuteur 4 3 2 1 4 3 6 1 2 6 5 5 Contrôle du jeux latéral anciens moteurs Pousser vers le haut et vers le bas alternativement Contrôler à ce niveau le film d’huile qui s’épaissit lorsque on pousse le ...

17 Views0 Downloads

 Manors trade travel read flat Jerusalem Muslims

Unit: Age of Exploration. MYP Unit Question: Why do people explore? What are the consequences? Monday, September 23. rd, 2019 Welcome to Unit 2! Reminders: LTA due Tuesday, 10/8!

10 Views0 Downloads

Flat Plate Collector Design Project Biogas

Design Project for 2009 Bioenergy Summer School. Engineer a solar flat collector that could be built in a developing nation. Must be portable and lighter than a typical solar collector. Possible applications: Hot water source. Merged with anaerobic digestion. Create a hot water tank for several people to utilize. Sterilize water

18 Views0 Downloads

Flat World Triple Convergence

In this new flat playing field, businesses and people adopted new habits, skills and processes. They moved from mostly vertical methods to more horizontal methods. Several billion new people came out on the field, mostly from China, India and the former Soviet Empire Convergence 1 – The Flatteners The flatteners started in about 1990.

9 Views0 Downloads


A flat fee is one that embraces all services that a lawyer is to perform, whether the work be relatively simple or complex. (2) When deposit required. If the client makes an advance payment of a flat fee prior to performance of the services, the lawyer must deposit the fee into the trust account. (3) Withdrawal of flat fee.

10 Views0 Downloads

Model to Unfold Laundry into a Flat Canonical Position

Model for Unfolding Laundry using Interactive Perception Bryan Willimon IROS 2011 San Francisco, California * Using a PUMA 500 and 3D simulation software, a piece of laundry is pulled in different directions at various points of the cloth in order to flatten the laundry.

13 Views0 Downloads