Re: Normalisation Problem

From: Vadim Tropashko <Vadim_member_at_newsranger.com>
Date: Thu, 12 Apr 2001 02:45:34 GMT
Message-ID: <iF8B6.3859$FY5.268605_at_www.newsranger.com>

In article <Ux7z6.2993$jz.252464_at_www.newsranger.com>, Aloha Kakuikanu says...
>
>We are working on Ariphmetics database for American Mathematical Society and
>disagree upon the following problem in Schema Design. In my design I have a
>table:
>
>Table ADD_SUBTRACT_FACTS
>+----------+-----------+-----+------+
>| OperandA | OperandB | Sum | Diff |

 +----------+-----------+------------+
>| 1 | 1 | 2 | 0 |
>| 5 | 3 | 8 | 2 |
>| ... | ... | ... | ... |
>+----------+-----------+-----+------+
>
>But other members of the team say that it's not normalized, and, therefore, have
>to be splitted into two:
>

I would suggest to decompose Operands in your design into:

OperandAinOnes
OperandAinTens
OperandAinHundreds

so that your first column become:

+----------------+----------------+--------------------+

| OperandAinOnes | OperandAinTens | OperandAinHundreds |

 +----------------+----------------+--------------------+
|       1        |       0        |          0         |
|       5        |       0        |          0         |

Received on Thu Apr 12 2001 - 04:45:34 CEST