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What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
how to find entities
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
What is the meaning of Recovery? In deferred update methods, if a transaction fails before arriving its commit point, it will not have altered the database in any way, so UNDO
multidimensional data model
What is the error handling Traditionally, bits have been sent over line lacking any error correcting scheme in physical layer. The presence of the CPU in each modem makes it po
how to data store?
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
SET concept is used in which type of modelling? SET concept is used in Network Model.
Discuss along with examples about several types of attributes present in the ER model? Types of Attributes are: • SIMPLE attributes are attributes which are drawn from the ato
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