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What is a database graph? The partial ordering implies that the set D may now be viewed as a directed acyclic graph, known as a database graph.
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
What are the various symbols used to draw an E-R diagram (any 3)?
explaination
a) Distinguish between ‘database' and ‘Database Management Systems (DBMS)'. b) List and briefly describe five potential benefits of the database approach compared to conventio
State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
a brief definition
Have a look around the site, and at some of the sites they have featured. These are all examples of bad design, and also offer an explanation about why they fall into this category
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