diff --git a/classes/db/DBMysql_innodb.class.php b/classes/db/DBMysql_innodb.class.php
index 856e51d82..b6e50d67e 100644
--- a/classes/db/DBMysql_innodb.class.php
+++ b/classes/db/DBMysql_innodb.class.php
@@ -443,13 +443,24 @@
                 $table_list[] = '`'.$this->prefix.$val.'`';
             }
 
-            // 컬럼 정리 
+			// 컬럼 정리 
             foreach($output->columns as $key => $val) {
                 $name = $val['name'];
                 $value = $val['value'];
+
                 if($output->column_type[$name]!='number') {
-                    $value = "'".$this->addQuotes($value)."'";
-                    if(!$value) $value = 'null';
+
+					if(!is_null($value)){
+						$value = "'" . $this->addQuotes($value) ."'";
+					}else{
+						if($val['notnull']=='notnull') {
+							$value = "''";
+						} else {
+							//$value = 'null';
+							$value = "''";
+						}
+					}
+
                 } elseif(!$value || is_numeric($value)) $value = (int)$value;
 
                 $column_list[] = '`'.$name.'`';
diff --git a/classes/db/DBMysqli.class.php b/classes/db/DBMysqli.class.php
index f2a52f55e..7b9a345ea 100644
--- a/classes/db/DBMysqli.class.php
+++ b/classes/db/DBMysqli.class.php
@@ -422,23 +422,30 @@
                 $table_list[] = '`'.$this->prefix.$val.'`';
             }
 
-            // 컬럼 정리
+            // 컬럼 정리 
             foreach($output->columns as $key => $val) {
                 $name = $val['name'];
                 $value = $val['value'];
 
                 if($output->column_type[$name]!='number') {
-                    $value = "'".$this->addQuotes($value)."'";
-                    if(!$value) $value = 'null';
+
+					if(!is_null($value)){
+						$value = "'" . $this->addQuotes($value) ."'";
+					}else{
+						if($val['notnull']=='notnull') {
+							$value = "''";
+						} else {
+							//$value = 'null';
+							$value = "''";
+						}
+					}
+
                 } elseif(!$value || is_numeric($value)) $value = (int)$value;
+
                 $column_list[] = '`'.$name.'`';
                 $value_list[] = $value;
             }
 
-            $query = sprintf("insert into %s (%s) values (%s)", implode(',',$table_list), implode(',',$column_list), implode(',', $value_list));
-
-            return $this->_query($query);
-        }
 
         /**
          * @brief updateAct 처리