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Computer Database
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Question
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Explain how a database could be recovered via reprocessing. Why is this generally not feasible?
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Describe the advantages and disadvantages of DBMS-provided and application-provided security.
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Explain the necessity of defining processing rights and responsibilities.How are such responsibilities enforced?
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Explain the meaning of the expression ACID transaction.
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In general, how should the boundaries of a transaction be defined?
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What is lock granularity?
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Explain the difference between an explicit and an implicit lock.
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Explain the difference between a database administrator and a data administrator.
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What is a self join?
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What is a join and explain different types of joins.
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What are triggers? How to invoke a trigger on demand?
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What are cursors? Explain different types of cursors. What are the disadvantages of cursors? How can you avoid cursors?
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What's the difference between a primary key and a unique key?
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Difference between a "where" clause and a "having" clause ?
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What are the Large object types suported by Oracle?
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What is the difference among "dropping a table", "truncating a table" and "deleting all records" from a table?
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What is GROUP BY?
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How can I find the total number of records in a table?
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How to get the results of a Query sorted in any order?
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How could I get distinct entries from a table?
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