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Explain the ANSI SPARC architecture
The three-schema architecture is as well known as ANSI SPARC architecture. The aim of the three-schema architecture is to separate the user applications and the physical database. The view at every of these levels is described by a schema. The procedures of transforming requests and results among levels are known as mappings. In this architecture, schemas can be illustrated at the following three levels:
What will be create when a primary key if combined with a foreign key? A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that
How to define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a
Database systems have many opposite efforts ?
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At its most essential level the DBMS architecture can be divide into two parts: the back end and the front end. The back end is responsible for managing the physical database an
Discuss how the bi-directional Implementations are made. In bi-directional implementation of the association, a pair of references must implement every link. The declarations a
why older data models are being replaced by new data models.
A Functional dependency is described by X Y between two groups of attributes Y and X that are subsets of R specifies a constraint on the possible tuple that can make a relation
For the relations answer the following queries in SQL Street (name, location, city) House (number, street_name) Lives (name, house_number) (i) Obtain the names of persons who liv
The Locking Protocol: To manage concurrency related problems we use locking. A lock is mainly a variable that is associated with a data item in the database. A lock can be located
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