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What is Interaction Diagram An interaction diagram shows an interaction, comprises of a set of objects and their relationships including the messages that may be dispatched be
What are the advantages of creating a table from existing table?
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
What is a trigger
What is a block and a block number? A block is a contiguous sequence of sectors from a single track of one platter. Every request specifies the address on the disk to be refere
Describe the benefits of OOD techniques OOD techniques are very useful for development of large and complex systems. It has been noted that large projects that are developed u
What is Cross Product? Simply Cross product is Binary Operator
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
What is the use of Union and intersection operation? Union: The result of this operation contains all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuple
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