add selectColumn function

inc/db.php

@@ -3,7 +3,7 @@
 /**
  * MySql query manager and generator
  * @author franzz
- * @version 2.0
+ * @version 2.1
  */
 class Db extends PhpObject
 {
@@ -98,7 +98,7 @@ class Db extends PhpObject
 	public function setTrace($bTrace=true)
 	{
 		$this->bTrace = $bTrace;
-		if($bTrace) $this->setDebug(true);
+		//if($bTrace) $this->setDebug(true);
 	}
 	
 	public function getTrace()
@@ -596,6 +596,22 @@ class Db extends PhpObject
 		return $asResult;
 	}
 	
+	public function selectColumn($sTableName, $asColumnNames, $asConstraints)
+	{
+		$sGroupBy = '';
+		if(!is_array($asColumnNames)) $asColumnNames = array($asColumnNames);
+		else $sGroupBy = $asColumnNames[0];
+		
+		return $this->selectRows(
+			array(
+				'select'	=> $asColumnNames,
+				'from'		=> $sTableName,
+				'constraint'=> $asConstraints
+			),
+			$sGroupBy
+		);
+	}
+
 	public function selectValue($sTableName, $sColumnName, $oConstraints=array())
 	{
 		if(!is_array($oConstraints))
@@ -663,6 +679,23 @@ class Db extends PhpObject
 			return array_combine($asKeys, $asValues);
 		}
 	}
+	
+	/*
+	public function select($asFields='*')
+	{
+		$oSql = new Sql($this, array('select'=>$asFields));
+		return $oSql;
 	}
 	
-?>
+	public function from($sTable)
+	{
+		$oSql = new Sql($this, array('from'=>$sTable));
+		return $oSql;
+	}
+	
+	public function getConnection()
+	{
+		return $this->oConnection;
+	}
+	*/
+}