diff --git a/inc/db.php b/inc/db.php
index 61b41d6..e8e2837 100644
--- a/inc/db.php
+++ b/inc/db.php
@@ -504,8 +504,16 @@ class Db extends PhpObject
 					{
 						if(is_array($asConstraints))
 						{
-							$asSelection[$sField] = "(".implode(', ', $asConstraints).")";
-							$asInfo['constOpe'][$sField] = " IN ";
+							if(array_key_exists($sField, $asInfo['constOpe']) && $asInfo['constOpe'][$sField]=='BETWEEN') {
+								//Between
+								$asSelection[$sField] = $asConstraints['from'].' AND '.$asConstraints['to'];
+								$asInfo['constOpe'][$sField] = " BETWEEN ";
+							}
+							else { 
+								//Multiple values (IN)
+								$asSelection[$sField] = "(".implode(', ', $asConstraints).")";
+								$asInfo['constOpe'][$sField] = " IN ";
+							}
 						}
 						elseif(!array_key_exists('constOpe', $asInfo) || !array_key_exists($sField, $asInfo['constOpe'])) $asInfo['constOpe'][$sField] = " = ";
 					}