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Apr 23, 2010
Unindexed Foreign Keys
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Less Overhead on Unindexed Foreign Keys A table level share lock is placed on unindexed foreign keys in a child table when doing an ...
Apr 5, 2010
RAID 2,RAID 3,RAID 4
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RAID 2 Data is distributed in extremely small increments across all disks and adds one or more disks that contain a Hamming code for redun...
Apr 3, 2010
RAID
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RAID an acronym for Redundant Array of Inexpensive Disks or Redundant Array of Independent Disks, is a technology that allows high levels o...
Mar 31, 2010
LOCKING IN ORACLE
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Two types of Locking In Optimistic locking the row will not be locked until the actual update is performed. In order to prevent the los...
Mar 26, 2010
WIDTH_BUCKET
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Syntax: WIDTH_BUCKET(column-name/expr, low/min,high/max,bucket_count) ; Divide a set o data into buckets (ie: partition ) with an equal ...
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