how can i normalize database tables?

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hi:
please help:
i have the following tables

desease_name=a,b,c,.....
symptom_list=a1,s2,d1......

then i want to normalize the tables and i want sql query command used to retrive the disease name for specific symptom input
""""""any information that is usefull for my question is ok!"""""
<<<<<<<thank u="" for="" u'r="" advice="">>>>>

Posted 12-Mar-10 1:59am

zerishlove

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Rod Kemp · Answer 1 · 2010-03-12T02:42:00

Solution 1

Here[^] is an article on the basics of database normalisation.

Posted 12-Mar-10 2:42am

Rod Kemp

Sandeep Mewara · Answer 2 · 2010-03-12T19:40:00

Please buy a good book to learn about databases. It will help you in Designing databases, writing queries, etc.

For the query you posted, here is one of the start that you can take:
MstDisease
Column1 Column2
1 Disease-A
2 Disease-B
3 Disease-C

MstSymptom
Column1 Column2
1 a1
2 a2
3 b1
4 b2
5 c1
6 c2
TrnDiseaseSymptom
Column1 Column2
(MstDisease ID) (MstSymptom ID)
1 1
1 4
2 2
2 4
2 6
3 1
3 3