MYSQL query based on multiple HTML Checkboxes - mysql

Question

I have a table containing soil analysis, around 400k rows, with about 30 columns. All rows have a Year column, where it says something between 1997 and 2014.
I let the user do a MySQL query based on a couple of HTML-forms and one checkbox for each year.
If no checkbox is filled it searches through every year in the table.
My intention is to let the user be able to select a specific year or several with the help of the checkboxes.
I have copied what i have right now. (I've excluded the variables and stuff, excuse the swedish here and there)
The HTML-forms work fine. But i haven't figured how to take use of the checkboxes yet. I have no idea how to implement them in the MySQL query. I've tried googling but the question seems kinda specific in my case.
I'd be really happy to hear your opinion in the matter.
<form id="form" action="statisticsToMap.php" method="post">
<p>______Minimum_____________Maximum______</p>
<p>pH: <input type="text" name="min-ph" onkeypress="return isNumberKey(event)"> pH: <input type="text" name="max-ph" onkeypress="return isNumberKey(event)"></p>
<p>P-AL: <input type="text" name="min-p" onkeypress="return isNumberKey(event)"> P-AL: <input type="text" name="max-p" onkeypress="return isNumberKey(event)"></p>
<p>K-AL: <input type="text" name="min-k" onkeypress="return isNumberKey(event)"> K-AL: <input type="text" name="max-k" onkeypress="return isNumberKey(event)"></p>
<p>Mg-AL: <input type="text" name="min-mg" onkeypress="return isNumberKey(event)"> Mg-AL: <input type="text" name="max-mg" onkeypress="return isNumberKey(event)"></p>
<p>Lerhalt: <input type="text" name="min-ler" onkeypress="return isNumberKey(event)"> Lerhalt: <input type="text" name="max-ler" onkeypress="return isNumberKey(event)"></p>
<p>Sand-Grovmo: <input type="text" name="min-sgrovmo" onkeypress="return isNumberKey(event)"> Sand-Grovmo: <input type="text" name="max-sgrovmo" onkeypress="return isNumberKey(event)"></p>
<p>Mullhalt: <input type="text" name="min-mull" onkeypress="return isNumberKey(event)"> Mullhalt: <input type="text" name="max-mull" onkeypress="return isNumberKey(event)"></p>
<p>Klicka i vilka årtal som du vill söka efter: (tomma rutor söker alla årtal)</p>
<input type="checkbox" name="1997" value="1997"> 1997
<input type="checkbox" name="1998" value="1998"> 1998
<input type="checkbox" name="1999" value="1999"> 1999
<input type="checkbox" name="2000" value="2000"> 2000
<input type="checkbox" name="2001" value="2001"> 2001<br>
<input type="checkbox" name="2002" value="2002"> 2002
<input type="checkbox" name="2003" value="2003"> 2003
<input type="checkbox" name="2004" value="2004"> 2004
<input type="checkbox" name="2005" value="2005"> 2005
<input type="checkbox" name="2006" value="2006"> 2006<br>
<input type="checkbox" name="2007" value="2007"> 2007
<input type="checkbox" name="2008" value="2008"> 2008
<input type="checkbox" name="2009" value="2009"> 2009
<input type="checkbox" name="2010" value="2010"> 2010
<input type="checkbox" name="2011" value="2011"> 2011<br>
<input type="checkbox" name="2012" value="2012"> 2012
<input type="checkbox" name="2013" value="2013"> 2013
<input type="checkbox" name="2014" value="2014"> 2014
<input type="checkbox" name="2015" value="2015"> 2015
<input type="checkbox" name="2016" value="2016"> 2016<br>
<p>Begränsa antal resultat:</p> <input type="text" name="limitrows" onkeypress="return isNumberKey(event)"> (Standard är 2000 rader)<br><br>
<table>
<tr>
<input type="submit" value="Sök i databas"onclick="submitForm('')">
<input type="submit" value="Visa resultat på karta" onclick="submitForm('statisticsToMap.php')">
</form>
</tr>
</table>
$sql = "SELECT `kundnr`, `Year`, `Provnr`, `pH`, `P_AL`, `P_HCl`, `K_AL`, `K_HCl`, `Mg_AL`,
`Cu_HCl`, `K_Mg_kvot`, `Bor`, `Ca_AL`, `Total_lerhalt`, `Sand_grovmo`, `Mullhalt`
FROM `analyser`
WHERE
(IFNULL(`pH`, '0') BETWEEN $minph AND $maxph)
AND (IFNULL(`P_AL`, '0') BETWEEN $minpal AND $maxpal)
AND (IFNULL(`K_AL`, '0') BETWEEN $minkal AND $maxkal)
AND (IFNULL(`Mg_AL`, '0') BETWEEN $minmg AND $maxmg)
AND (IFNULL(`Total_lerhalt`, '0') BETWEEN $minler AND $maxler)
AND (IFNULL(`Mullhalt`, '0') BETWEEN $minmull AND $maxmull)
AND (IFNULL(`Sand_grovmo`, '0') BETWEEN $minsgrovmo AND $maxsgrovmo)
LIMIT 0,$limitrows";
/Simon

Answer 1

Wouldn't that simply be the case where you will dynamically build a YEAR IN (..) clause based on the year selection? E.g. when 2008, 2010 and 2012 were selected:
SELECT * FROM SOIL_DATA WHERE YEAR IN (2008, 2010, 2012)