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How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Security: Data not needed by local applications is not stored at the site, therefore no unnecessary security violations may exist. But how can we carry out fragmentation? Fragm
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
What is relationship instance ? Relationship Instance - A relationship is a relation between two or more entities. An instance of relationship set is a set of relationships.
Explain the Log Based Recovery Method? The system log that is generally written on stable storage consists of the redundant data required to recover from volatile storage failu
What is the meaning of Data Independence ?
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
Describe log based recovery The most usably structure for recording data base modification is the LOG the log is a sequence of log records recording all the update activities i
Which operations need the participating relations to be union compatible? A UNION, INTERSECTION and DIFFERENCE operations need the participating relations to be union compatibl
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