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What subschema expresses ?
A subschema expresses the external view. (External schemas are called also called as subschemas)
how many hourse have been spent on a certain project
under what condition log based recovery is feasible?
What benefits can a company gain by managing its own information infrastructure and servicea
Aggregate functions Some of these functions are min, count, max, and avg. These functions help in getting consolidated information from a set of tuples. Example:
Discuss the count function? The COUNT function used returns the number of tuples or values fixed in a query. The count function comprises two types of syntax: (1) COUNT (*)
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
State about the Use Case Diagram A use case diagram represents a set of use cases, actors and their relationships. These diagrams shall be used to model context or requirement
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
intent locking
What are the problems if one were not to normalize? When do these problems surface? Ans: Database normalization, sometimes considered to as canonical synthesis, is
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