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Oracle Interview Questions


Oracle Interview Questions

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Latest Answer: A materialized view (MV) is similar to a view but the data is actually stored on disk (view that materializes). Materialized views are often used for summary and pre-joined tables, or just to make a snapshot of a table available on a remote system. A ...
Read Answers (8) | Asked by : rekha
Latest Answer: Truncate is faster than delete statement because delete statement generate redo while truncate generate minimum redo. Delete can be rollback truncate command can not be rollback. Truncate command reset high water mark in the segment and release the space ...
Read Answers (17) | Asked by : SaratKumar
View Question | Asked by : SaratKumar
Latest Answer: When any DML operation is taking long time which may lead reuse of datablocks of undo segment by another  DML, in this case oracle will throw snapshot too old error.For any DML oracle stores the undo image in rollback segment, suppose transaction A is ...
Read Answers (5) | Asked by : SaratKumar
Latest Answer: When this query will be submitted to oracle it goes into different stages .ie. parse,bind,execute and fetch the result set. ...
Read Answers (7) | Asked by : SaratKumar
Latest Answer: REF CURSOR - This cursor could be used for processing more than one SELECT query.                       NORMAL COUSIR - This cursor could be ...
Read Answers (11) | Asked by : SaratKumar
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