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WRITE SHORT NOTES ON INDEX STRUCTURE OF FILES?
There are two basic parts of indices
1. Ordered indices
2. Hash indices
Every technique must be evaluated on the basis of these factors:
Ø Ordered indices
Ø Primary index
Ø Dense and sparse indices
Ø Multilevel index
Ø Index update
Ø Secondary indices
B+-Tree index files
B+-Tree index structure is the most widely used of various index structures that maintain their efficiency despite insertion and deletion of data.
Ø Structure of B+-Tree
Ø Queries on B+-Tree
Ø Update on B+-Tree
Ø B+-Tree file organization
Ø B-Tree index files
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
vertical fragmentation
Define Two phase commit Two phase commit: To make sure atomicity, all the sites where a transaction is being executed must agree on the final outcome of the execution. The tran
Ask questiwhat is row indicator in database on #Minimum 100 words accepted#
This report identifies and outlines my CIS 499 project named Traffic Data Management Systems (TDMS) . My goal is to design a replica of all traffic issues to be implemented i
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
#question.what is mapping constraints and types?.
Attributes and its types explain?
What is Oracle databse structure? Oracle database structure: The relational model has three main aspects: Structures: Structures are well-defined objects which store th
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