SQL query used for duplicate rows or columns

Question

3.67/5 (2 votes)

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i have the following table

diseasename:A symptomlist:a1,a2,a3
diseasename:B symptomlist:b2,a1,c2
diseasename:B symptomlist:b3,a1,c2,a3

Then i want to retrieve disease name for dynamic input of symptom list
when they retrieve the disease it counts the disease eg. if the the input of symptom list are :a1,b2,c2
the out put is:

count=1        diseasename=A
count=3        diseasename=B
count=1        diseasename=C

"please help"
sql query ,normalizing the table, any code or any useful information is ok.

THANK U FOR U'R ADVICE

Posted 23-Feb-10 20:45pm

tobesazed

Updated 23-Feb-10 23:26pm

Sandeep Mewara

v5

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Sandeep Mewara · Accepted Answer · 2010-02-23T23:40:00

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