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Views
A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT statement in the data dictionary. When the user needs to retrieve data, using view. Then the following steps are defined.
1) View definition is finding from data dictionary table. For example, the view definitions in oracle are to be finding from table name USER-VIEWS.
2) Checks access privileges for the view base table.
3) Changes the view query into an equivalent operation on the underlying base table
Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. This database stores records from a (ve
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State the Design of Associations Before designing associations, it is essential to know the way they are used. For this, analysis of association traversals is required. It is
Introductory course and so does not require any fancy coding. I will provide a guidance document to help you in producing the solutions.
Explain Candidate Key and Super Key A super key is a set of one or more than attributes that, taken collectively, permits us to identify uniquely a tuple in the relation. Wher
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Process of Adjustment of inheritance During object design, inheritance is readjusted by rearranging classes and operations, and abstracting common behaviour.
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
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