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Published on 2010-03-30T18:46:09Z
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does a char take 1 byte in database?
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Hi,
I new in database design.
What is better option for product attribute database design for cms?(Please suggest other options also).
option 1: 1 table
products{
id
product_name
color
price
attribute_name1
attribute_value1
attribute_name2
attribute_value2
attribute_name3
attribute_value3
}
option…
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Investing in proper database design is a very efficient way to cut maintenance costs. If we expect a system to last, we need to make sure it has a good solid foundation - high quality database design. Surely we can and sometimes do cut corners and save on database design to get things done faster…
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I am creating a database that will help keep track of which employees have been on a certain training course. I would like to get some guidance on the best way to design the database.
Specifically, each employee must attend the training course each year and my database needs to keep a history of…
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By fiscal year I mean all the data in the database (in all tables) that occurred in the particular year. Lets say that we are building an application that allows user to choose from different years.
What way of implementing this would you prefer, and why:
Separate fiscal year data based on multiple…
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I have a new table I'm going to add to a bunch of other summarized data, basically to take some of the load off by calculating weekly avgs.
My question is whether I would be better off with one model over the other. One model with days of the week as a column with an additional column for price…
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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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Database ??
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Java
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ID??/??????
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