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Published on 2010-04-29T23:42:25Z
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If databases can support up to millions of records, how is all of this data organized such that queries can be executed in a reasonable amount of time?
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I recently downloaded Ideras SQL virtual database, and tested it. There are a few things about this tool which caught my attention.My ScenarioIt is quite common in real life that sometimes observing or retrieving older data is necessary; however, it had changed as time passed by. The full database…
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To clone a database using Rman we used to require an existing Rman backup, on 11g we can clone databases using the "from active" database option.
In this case we do not require an existing backup, the active datafiles will be used as the source for the clone.
In order to clone with the source database…
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Hello,
I'm using cPickle to save my Database into file. The code looks like that:
def Save_DataBase():
import cPickle
from scipy import *
from numpy import *
a=Results.VersionName
#filename='D:/results/'+a[a.find('/')+1:-a.find('/')-2]+Results.AssType[:3]+str(random.randint(0,100))+Results.Distribution+"…
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Snapshot database is one of the most interesting concepts that I have used at some places recently.
Here is a quick definition of the subject from Book On Line:
A Database Snapshot is a read-only, static view of a database (the source database). Multiple snapshots can exist on a source database and…
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MySQL
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ORACLE MASTER…
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What are some clever (not ordinary) ways of implementing data structures in C, and what are some data structures that should be used more often?
For example, what is the most effective way (generating minimal overhead) to implement a directed and cyclic graph with weighted edges in C?
I know that…
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When we design applications, we generally end up with the same tiered sets of data structures:
A persistent data structure that is described using DDL and implemented as RDBMS tables and columns.
A set of domain objects that consist primarily of data structures, usually combined with business-rule…
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I am a newbie into the corporate world recently graduated in computers. I am a java/groovy developer. I am a quick learner and I can learn new frameworks, APIs or even programming languages within considerably short amount of time. Albeit that, I must confess that I was not so strong in data structures…
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Hello,
I have to design a data structure that is to be used in a multi-threaded environment. The basic API is simple: insert element, remove element, retrieve element, check that element exists. The structure's implementation uses implicit locking to guarantee the atomicity of a single API call.…
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There is a large stream of numbers coming in such as 5 6 7 2 3 1 2 3 .. What kind of data structure is suitable for this problem given the constraints that elements must be inserted in descending order and duplicates should be eliminated.
I am not looking for any code just ideas? I was thinking…
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