Posted by Jerry Stuckle on 11/28/77 11:49

strawberry wrote:
> http://dev.mysql.com/tech-resources/articles/intro-to-normalization.html
>
> Kentor wrote:
>
>>hello, im trying to make a little loop, but i cant figure it out... i
>>have a string with a bunch of 1s and 0s in it: 110101010101111010101
>>... i need to count the number of 1s divide it by 2 and make a table
>>with 2 columns and then for every one, depending on its position in the
>>string i need to output a word and then go to the next 1 and output a
>>dif word....
>>
>>its amenities, winter activities and summer activities for cottages
>>that i store in my db with 1s and 0s when its a 1 the amenitie or
>>whatever exists when its a 0 then it doesent exist...
>>
>>an example of the kind of table that i need is here:
>>http://www.chaletsauquebec.com/FicheChalet.aspx?IdChalet=2011
>
>

That's the hard way to do it. You have one field which contains multiple
values, which is almost never right. Rather, have three tables.

Cottage
cottage_id (other info}

Amenity
amenity_id amenity_description

Cottage_Amenity
cottage_id amenity_id


To get a list of amenities for a specific cottage, do:

SELECT amenity_description
FROM Amenity a, Cottage_Amenity ca
WHERE ca.Cottage_id = $cottageed AND
ca.amenity_id = a.amenity_id

And google "database normalization" for more information on how to normalize
tables correctly.

--
==================
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Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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