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In a Hierarchical model of data records are organized ? In the hierarchical model of data records are organized as Tree structure.
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
Write a short note on QBE? Stands for "Query By Example." QBE is a feature involved along with various database applications which gives user-friendly techniques of running da
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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I need help with some assignments
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
There are two major types of fragmentation: Horizontal& Vertical. Horizontal fragments, as the name suggests are subsets of tuples and vertical fragments are subsets of attributes
Hi is anyone well versed in accounting information systems available now to help me work through an important assignment due tomorrow at noon?
An entity set that does not have sufficient attributes to form a primary key is called? An entity set that doesn't have sufficient attribute to form a primary key is known as w
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