The history began between Relational Databases and SQL. In 1970‚ Edgar F. Codd wrote the now-famous paper on relational data modeling: "A Relational Model of Data for Large Shared Data Banks." The original relational database language‚ developed by IBM‚ was called SEQUEL (Structured English Query Language) to support its prototype RDBMS (Relational Database Management System) called System/R. The name later was changed from SEQUEL to Structured Query Language. In the beginning Codd started out a
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Topic#6: Relational Database Operators 6.1 Significance of Relational Operators • Relational database supports basic database operations in order to provide useful means for retrieving or manipulating data in tables. • Because the relational model has its mathematical basis upon the relational theory (by thinking tables as sets or relations)‚ the supported database operators conform to existing operators in relational algebra. • In fact‚ a relational database software implementation
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Review Entity-Relationship Diagrams and the Relational Model CS 186‚ Fall 2007‚ Lecture 2 R & G‚ Chaps. 2&3 A relationship‚ I think‚ is like a shark‚ you know? It has to constantly move forward or it dies. And I think what we got on our hands is a dead shark. Woody Allen (from Annie Hall‚ 1979) • Why use a DBMS? OS provides RAM and disk Review • Why use a DBMS? OS provides RAM and disk – Concurrency – Recovery – Abstraction‚ Data Independence – Query Languages – Efficiency (for most tasks)
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U05A1 RELATIONAL DATABASE SYSTEM – SQL TUTORIAL IT2230 Introductions to Databases u05a1 Relational Database System – SQL Tutorial Assignment Overview of Lesson Assignments Table of Contents Overview of Lesson Assignments 2 LESSON 3 3 Exercise 1 3 Exercise 3 3 Exercise 5 4 Summary of Lesson 3 4 LESSON 4 5 Create Table Exercise 5 Summary of Lesson 4 5 LESSON 5 6
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Introduction The purpose of this annotated bibliography is to demonstrate the effect of Team dynamics and change. In many terms‚ team dynamics is focused on mutual interaction among the team members‚ their actions‚ and responses. Therefore‚ the rapidly changing work environment and adaptation to the changes are the major facts leading to the switch of the comfort zones and fear of the possible changes within almost all the levels of the organization. The theories of Kurt Lewinee and Bruce Tuckman
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Software-as-a-Service for Microsoft Dynamics NAV What is SaaS? As more and more organizations are turning to Software-as-a-Service (SaaS) for their needs of technology‚ SaaS is becoming an increasingly prevalent software delivery model‚ which is commonly known as a more cost-effective and flexible alternative to traditional on-premises model. Software-as-a-Service or SaaS is a method of delivering software over the Internet. It is an on-demand software service through which a SaaS vendor hosts
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Group Case 1 Group 5 2/27/13 Microsoft Dynamics Customer Solution Case Study: Nonprofit Empowers Team‚ Markets More Effectively with Association Management Solution Background of the Organization National Middle School Association is a nonprofit organization. They have 25 employees that provide professional development‚ journals‚ books‚ research‚ and information to middle school teachers in the United States. NMSA generates about $6.5 million a year in revenue through membership fees
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Sarkhej - Gandhinagar Highway Ahmedabad-382481(Gujarat) M: 09723618303 Fax: 02717-241917 e-mail: vikas.lakhera@nirmauni.ac.in ABSTRACT Flow analysis in centrifugal pumps has long been an intensive subject of research. Computational Fluid Dynamics (CFD) is the present day state-of-art technique for fluid flow analysis. Numerical simulation of 200 m3/hr capacity centrifugal pump carried out using commercial CFD package FLUENT is presented. The steady state simulations were carried out
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Group Dynamics in Psychology Social- In my social group‚ it is clear that we are a collection of individuals guided by roles and norms. We‚ as friends‚ clearly influence each other‚ satisfy personal needs through association‚ and could be classified as a unit due to our common relation and degree of similiarity. I also notice a great degree of interdependence. That is‚ evnts affecting one Work- Contrastingly‚ in my work
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GAS DYNAMICS AND JET PROPULSION 1. What is the basic difference between compressible and incompressible fluid flow? Compressible 1. Fluid velocities are appreciable compared with the velocity of sound 2. Density is not constant 3. Compressibility factor is greater than one. 2. Write the steady flow energy equation for an adiabatic flow of air. In an adiabatic flow q = 0. Therefore energy equation becomes. 2 c12 c2 h1 + + gZ1 = h2 + + gZ 2 + Ws 2 2 Incompressible 1. Fluid velocities are small
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