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What is conceptual schema?
The schemas at the view level are known as subschema that describe dissimilar views of the database.
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
Question: Data Mining is the process of extracting knowledge hidden from large volumes of raw data. (a) Using a suitable example, illustrate how Data Mining can be useful t
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
why we fregment at all?
What is relational model feature? A relational model feature is much more data independence than some other database models.
What is key ? Key - A single attribute or a combination of two or more attributes of an entity set which is used to recognize one or more instances (rows) of the set (table) is
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
Define the Division Operation of Relational Algebra Let R be a relation comprising attributes (A1,...Ap,Ap+1,...An) and S comprising attributes (Ap+1,...An) DEF: Division
external and internal mapping with examples
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