RE: [PHP] getting a number range from user input.. (weight)
| From: | Murray @ PlanetThoughtful | Date: | Fri, 05 Nov 2004 06:16:02 +0000 |
| Subject: | RE: [PHP] getting a number range from user input.. (weight) | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-201261@lists.php.net to get a copy of this message | ||
I don't understand why you have the 'Weight_kg = "6"' clause in your WHERE
statement?
Aren't you attempting to return one of the zone values depending on a value
that falls between range and weight_kg?
Let's say, for example, that the value you're searching for is .45. The
following statement would correctly return the record below:
SELECT * FROM rates_dhl WHERE .45 BETWEEN range AND Weight_KG
In your PHP code, you'd probably use a variable when building the SQL
statement.
Something like:
<?
$srchvar = .45;
$sql = "SELECT * FROM rates_dhl WHERE $srchvar BETWEEN range AND Weight_KG";
// Retrieve recordset from db as normal
?>
This is assuming range and Weight_KG are both decimals in your db, rather
than VARCHARS etc.
It may be that I've misunderstood what you're attempting to do.
Much warmth,
Murray
http://www.planetthoughtful.org
Building a thoughtful planet,
One quirky comment at a time.
> -----Original Message-----
> From: Louie Miranda [mailto:lmiranda@gmail.com]
> Sent: Friday, 5 November 2004 4:06 PM
> To: Murray @ PlanetThoughtful; php-general@lists.php.net
> Subject: Re: [PHP] getting a number range from user input.. (weight)
>
> I have this on my db.
>
> mysql> select * from rates_dhl where weight_kg = "6" between range and
> Weight_KG;
> +----+-------+-----------+--------+--------+--------+--------+--------+---
> -----+--------+--------+
> | id | range | Weight_KG | Zone_A | Zone_B | Zone_C | Zone_D | Zone_E
> | Zone_F | Zone_G | Zone_H |
> +----+-------+-----------+--------+--------+--------+--------+--------+---
> -----+--------+--------+
> | 1 | .000 | .5 | 9.45 | 12.29 | 14.18 | 15.12 | 16.59
> | 18.48 | 21.32 | 23.63 |
> +----+-------+-----------+--------+--------+--------+--------+--------+---
> -----+--------+--------+
> 1 row in set (0.00 sec)
>
> When i did try the between, even when i try to change the weight_kg to
> any number, it only display the first entry.
>
>
> On Fri, 5 Nov 2004 15:52:16 +1000, Murray @ PlanetThoughtful
> <lists@planetthoughtful.org> wrote:
> >
> >
> >
> > > OK, here is what it should do.
> > >
> > > I have a fixed range of weights from .5 to 20.0 Kg (kilogram) and for
> > > each weight it has a succeeding value, i cannot jump or just round off
> > > the numbers. So i need a range detector to do it.
> > >
> > > Because for each of the item below:
> > >
> > > > weight value
> > > > .5 9.45
> > > > 1.0 10.71
> > > > 1.5 11.97
> > > > 2.0 13.23
> > >
> > > I must get the exact value, so let say for example. I have 1.3 it
> > > should fall under 1.5 the idea i had was to do this, so i can detect
> > > where the number should fall..
> >
> > Put the weight ranges in a MySQL table and use the BETWEEN operator to
> > retrieve the appropriate weight.
> >
> > Something like:
> >
> > fromweight, toweight, value
> > 0,0.5,9.45
> > 0.501,1.0,10.71
> > 1.001,1.5,11.97
> >
> > Then, the following SQL statement will pull the appropriate value:
> >
> > SELECT value FROM weights WHERE 1.3 BETWEEN fromweight AND toweight
> >
> > Much warmth,
> >
> > Murray
> > http://www.planetthoughtful.org
> > Building a thoughtful planet,
> > One quirky comment at a time.
> >
> > --
> >
> >
> > PHP General Mailing List (http://www.php.net/)
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
> >
>
>
> --
> Louie Miranda
> http://www.axishift.com
>
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