Aslan wrote:
Hey there,
I have a range of records that represent different faults and different
symptoms that I want to pull out of the database, and to find the
records that are the closest within each range.
I am currently doing it with a barrage of if statements, but I am sure
that this could be done faster and far more elegantly by using SQL
I have a range of conditions eg
Attainable rates:
0-500 KB/sec is very poor
500 - 1000 is marginal
1000- 3000 KB/sec is good
So the database may look like:
Type|Min|Max|Value
Attainable|0|500|" This rate is very poor"
and then SQL could go something like
SELECT * FROM table WHERE Type= "Attainable" AND Min LIKE $var
You're close, try this
SELECT *
FROM table
WHERE Type = "Attainable"
AND Min <= $var
AND Max >= $var
as long as your min and max do not overlap from row to row, you should only
get one result. Make sure in your data that you have no overlap.
Row 1 = 0 - 499
Row 2 = 500 - 999
Row 3 = 1000 - 1499
But that wouldn't work quite right I don't think.
But where it can get a bit more hairy is that I want to have a whole
range of variables that are input from an entry table, and then it just
finds the the vars that are the closest to what is searching for all the
vars. The closest code I have seen doing something similar is where
there it is finding if an IP is in a certain range.
Does that make sense? feel free to email me if you need more explanation.
It is kind of like a multi variable search engine, that is finding the
root cause of the symptoms that are the very best fit given the
multi-variables...
Thanks heaps for any assistance,
Aslan.
--
Jim Lucas
"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."
Twelfth Night, Act II, Scene V
by William Shakespeare
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