PHP error happened

Technical information
Error type	256
Error description	Unknown column '_ProdMinInc.22' in 'where clause'
URL	www.cecindustries.com/user/_ProdMinInc_list.php?a=search&SearchField=22&SearchOption=Equals&SearchFor=Miniaturea=search&SearchField=22&SearchOption=Equals&SearchFor=Miniature
Error file	/home/ceclight/public_html/user/include/dbconnection.php
Error line	34
SQL query	select count(*) FROM `_ProdMinInc` LEFT OUTER JOIN `_ItemImage` ON `_ProdMinInc`.FigureNum = `_ItemImage`.FigureNum where (`_ProdMinInc`.AvailDt <= curdate() ) and (`_ProdMinInc`.`22`=upper('Miniature'))