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What is association? Give an example of association
Association is used for establishing relationships among classes. Association describe links among/between classes. For example, if a professor works in a university then it can be represented as
Which method is used to key transformation ? A hash method is used to key transformation.
If R1 and R2 are two union compatible relations or functions, then the result of R3 = R1 ∩R2 is the relation that contains all tuples that are in both the relations In other words,
how to connect vb.net with access
Why containment is important in oosystems? Containment is an significant concept in oosystems because it allows dissimilar users to view data at different granularities.
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
Explain the main advantages of DBMS over File Oriented System ?
Consider a bank that has a collection of sites, each running a database system. Suppose the only way the databases interact is by electronic transfer of money between one another,
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Describe integrity constraints? Integrity Constraints - A database is just as excellent as the information stored in it, and a DBMS must therefore help avoid the entry of inc
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
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