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Cardinality shows the number of instances of an entity associated with another entity participating in a relationship. Depend on the cardinality binary relationship can be further dividing into the following categories:
Example: Relationship between university/college and principal
One college only have at the most one principal and one principal can be assigned to only one college.
Likewise we can define the relationship among Vice Chancellor and university.
Explain algorithm of ER To Relational Mapping ? ER-to-Relational Mapping Algorithm: 1) Step 1: Mapping of regular entity types: For each strong entity type E, form a relatio
Which database object does not physically exist? A view database object does not physically exist.
sql is relationally complete-justify
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
One-to-many : An entity in A is related with any number of entities in B. An entity in B is related with at the most one entity in A. Example: Relationship between faculty and d
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
complete er diagram of textile industry management
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
Support by Adding Indexes Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the numbe
Define the concept of generalization A generalization is relationship between specific kind of thing and general thing. It is also known as "is-a-kind-of" relationship. Inher
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