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What is vertical fragmentation?
Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
Explain the components of Database System in details.
define anomalies and different types of anomalies with example
Describe the algorithm to draw the dependency graph? Ans: Algorithm to draw Precedence Graph is like this: a. For every transaction T i participating in schedule S, make
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
what are the states of transaction?
Fragmentation: It is definite as partitioning of a relation into various fragments.Every fragment can be stored at a dissimilar site.
What do you understand by RAID? Explain RAID Level 4 and Level5? RAID - It is stands for Redundant Array of Inexpensive Disks (as named by the inventor), or alternatively Re
What is a view? A view is a logical view on one or more tables. A view on one or more tables i.e., the data from a view is not actually physically kept instead being derived f
database help
it can be possible to create any table without primary key
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