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Why older data models are being replaced by new data modelling 100 words accepted#
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
What is Outer join? They can be employed while we want to keep all the tuples in R, or all those in S or all those in both relations in the result of the JOIN in spite of of w
Describe the difference between a one-to-many and a many-to-many relationship. Which logical data structures comprise one-to-many and which comprise many-to-many relationship?
What is data block? Data Block - In oracle the data blocks are referred to as tablespaces. A tablespace is an fields of disk consisting of one or more disk files. A tablespace
what problems are raised by the database? why is it so controversial? why is data quality an issue?
what is multivalued dependency
The database will enable college administrators the ability to track students initial major. This will help college officials decide how best to prepare students for their goals an
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
Every simple attribute of an entity type have a possible set of values that can be attached to it. This is known as the domain of an attribute. An attribute cannot have a value out
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