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First Normal Form and second normal form
First Normal Form (1NF)
A relation is said to be in 1NF if it having no non-atomic values and each row can give a unique combination of values.
Second Normal Form (2NF)
A relation is said to be in 2NF f if it is already in 1NF and each attribute fully depends on the primary key of the relation. Speaking inversely, if a table has some attributes which is not dependant on the primary key of that table, and then it is not in 2NF.
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What is Natural Language Interfaces? Natural Language Interfaces - These interfaces accept requests written within English or a few other language and attempt to "understand" t
Show a centralised schema to support the operation of the system you have chosen, including in particular: the product catalogue; the outlets and respective stocks; customer record
What are the two main goals of parallelism? Load -balance multiple small accesses, so that the throughput of such accesses enhances. Parallelize large accesses so that the res
Define Single Value and Multivalued attribute Single value attribute comprise a single atomic value for an entity and multivalued attribute may have much more than one value f
Describe Graphical User Interface? Graphical User Interfaces (GUIs) - A GUI typically displays a schema to the user in diagrammatic form. The user can then specify a query th
write short note on mobile database
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
In Database software have only pure security or some dis secured by administrator?
what is er digram given that example of hospital,bank and library er digram.
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