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Explain different categories of failures that occur in Oracle database?
Categories of Failures - In Oracle database subsequent types of failures can occurred: Statement Failure• Bad data type• Insufficient space Insufficient Privileges (e.g., object privileges to a role) User Process Failure• User performed an abnormal disconnect• User's session was abnormally terminated• User's program raised an address exception User Error• User drops a table• User damages data by modification Instance Failure Media Failure• User drops a table• User damages data by modification Alert Logs• Records informational and error messages• All Instance startups and shutdowns are recorded in the log
what is 3nf
What is meant by functional dependencies? Consider a relation schema R and α C R and β C R. The functional dependency α ->β holds on relational schema R if in any legal relati
explain multi key file organisation
Saving Derived Attributes to Avoid Re-computation As discussed, "redundancy means duplication of exact data". But, if multiple copies of same data are present in the system,
give me a diagram about physical or internal level
Benefits of using heuristics
Which of the operations constitute a basic set of operations for manipulating relational data? Relational algebra operations constitute a basic set of operations for manipulati
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
What are the components of storage manager? The storage manager components include a) Authorization and integrity manager b) Transaction manager c) Buffer manager d
What are the different approaches for database design? There are two basic approaches for database design which are as follows: Attribute driven: It compiles a list of att
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