I don't have a solid grasp on the concepts of normalization, and particularly creating database relationships. So I guess I inadvertently created a good example to learn from because I have been "normalizing" by coding repetitive columns into a separate table such as table "Size". However, it seems I am incorrectly trying to create a relationship by inserting it back into the "Cars" table, when I should be joining the two tables as Skeeve suggested above?
I think my lack of experience prevents me from understanding the implications of these schema design decisions.
So if I add that third table with idCars and idSize, then I don't need to worry about adding a column to "Cars" table as the relationship now exists in that new table, "CarSize", which I can call upon to join with "Cars" or "Size" table to see the actual names?
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.