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What are referential integrity constraints?
A value that appears in single relation for a given set of attributes also appears for a particular set of attributes in another relation.
In which format database schema is written ? Data base schema is written in the DDL format.
explain the steps for reduction of er model into relational model?
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
What is a value? A data value is used for identity. This form of identity is used in relational systems.eg: The primary key value of a tuple recognize the tuple.
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
Determine the concept of Process Process: A process transforms the data values. It is represented as ellipse containing a description of transformation. Each procedure has a
Create Relational Database Model (RDM) for Sailing bed and breakfast club Table_Name( attribute_1, attribute_2, attribute_3, ? ,attribute_x) Primary Key ( attribute_1, attribute_2)
Explanation on Data Sharing?
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
#question.explain diversity and magnitude of organic compounds and general properties?
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