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how map binary relation one to one
Which method of access uses key transformation? A Hash method of access uses key transformation.
what is definition hierarchical data model
Deadlock And Its Prevention: As seen earlier, though two phase locking protocol handles the trouble of serialisability, but it causes some troubles also. For instance, consider th
ALTER TABLE Command : This command is used for variation of existing structure of the table in the given situation: When a new column is to be added to the table structure.
If R1 and R2 are two union compatible relations or functions, then the result of R3 = R1 ∩R2 is the relation that contains all tuples that are in both the relations In other words,
What is the use of integrity constraints? Integrity constraints make sure that changes made to the database by authorized users do not result in a loss of data consistency. The
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
(a) Why did SAP introduce the extended star schema?
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
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