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Although how will the system recover The selection of REDO or UNDO for a transaction for the recovery is completed on the basis of the state of the transactions. This state is
Set Difference If R1 and R2 are two union compatible relations or relations then result of R3 =R1- R2 is the relation that have only those tuples that are in R1 but not in R2.
what is union compatable?
Let us first describe the term relationships. What Are Relationships? A relationship can be defined as: A set of associations or connection, or A rule for communic
What is conceptual model ? A conceptual model is a independent of both hardware and software.
What is a data dictionary? Data Dictionary is a main source of data in a data management system. Its major function is to carry the creation and management of data definition
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
WOUND-WAIT
Describe the statement in SQL which allows to change the definition of a table? In SQL Alter statement is used to allow the changes the definition of a table.
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
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