Table Relationship Questions.

Jul 7, 2007

Hi Everyone,

I'm just at the start of database project to see if I can reproduce some kind of Management Game.

I'm quite focussed on making sure I have an efficient design for the database at this stage.

I've created most of my tables, and have also created most of the relationships between them, however I've got a couple of issues which I'm ummming and ahhhing about, to which I thought I'd see if anyone in here could help me.



1. I have a player table which will contain numerical values from 1-20 (Not integers) for different player attributes. The value of those attributes will be looked up and a text entry returned for any reports which would be seen by a user.

I want to do this for more than one type of attribute (i.e. Strength, Speed), is it more efficient to store all the text entries for those attributes together in one Attributes Table, or to store them separately in different tables?

(The text entries may be different for some of the attributes; this data would often be reported on collectively).



2. I have a Teams Table; each team would belong to a Region and then a Country with each Country having more than 1 Region. (i.e. ‘Yorkshire’ and ‘Lancashire’ would both be part of The UK…. All be it quite possibly not altogether happy about being next to one another ;-) )

Should I relate the Teams Table to a Region Table and then relate that to a Country Table? Or should I just make one relationship to a Table containing both Regions and Countries? (I'm thinking for normalization to take the first option, but am not certain)



3. I have a few tables that would link to quite simple data called Gender, it contains two options. 'Male' and 'Female'

For each table that would link to this information; should I have one Gender Table containing this data and relate them all to it, or should I create a separate Gender Table for each instance?



4. In my Players Table I have the option for each player to be carrying something in Both a ‘Left’ and ‘Right’ hand. I've created a separate field for each piece of data in the Players Table. The object being carried in each hand could be the same or different, or require both hands.

For each hand should I create a separate Objects Table containing the same data and then link to it, or is it more efficient to link both fields to the same Objects Table field?



I hope this is clear, but if not I’m more than happy to elaborate.



Thanks in advance to anyone who can help.

Kind regards,
pdjacks

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