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What is trigger?
Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
What does the cardinality ratio specify? Mapping cardinalities or cardinality ratios state the number of entities to which another entity can be associated. Mapping cardinaliti
Should I select imaging software that allows changes? An imaging system should not give features to edit or alter images. Images generally are formed as safe and secure records
Explain the Log Based Recovery Method? The system log that is generally written on stable storage consists of the redundant data required to recover from volatile storage failu
You are to write a property management database program that allows a real estate agent to view, add, search, and save property listings. The program is to do the following: 1.
When are they useful? Justify with an example. The temporary tables are commonly used to support specialized rollups or exact application processing needs. Unlike a permanent t
what is attribute is attribute inheritance in dbms?
Describe Physical Data independence ? Physical Data Independence - It is capacity to modify the internal schema without having to change conceptual schema. Therefore, the exter
Let us now talk about the relational operations: SELECT The select operation is used to select few specific record from the database based on different criteria, This is a un
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
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