diff --git a/src/BBOrm/DBInstance.php b/src/BBOrm/DBInstance.php
index 5a29f84..afcdaab 100644
--- a/src/BBOrm/DBInstance.php
+++ b/src/BBOrm/DBInstance.php
@@ -4,11 +4,11 @@ namespace BBOrm;
 
 class DBInstance {
 
-    public static function execute($sql, $intance = 'default', $data = null) {
+    public static function execute($sql, $data = null, $intance = 'default') {
         if ($data) {
             self::query_prepare($sql, $data, $instance);
         } else {
-            $con = Connections::get_connection('default');
+            $con = Connections::get_connection($intance);
             $con->exec($sql);
         }
     }
@@ -18,28 +18,28 @@ class DBInstance {
         return $con->lastInsertId();
     }
 
-    public static function query($sql, $instance = 'default', $data = null) {
+    public static function query($sql, $data = null, $instance = 'default') {
         if ($data) {
             return self::query_prepare($sql, $data, $instance);
         } else {
-            $con = Connections::get_connection('default');
+            $con = Connections::get_connection($intance);
             return $con->query($sql, \PDO::FETCH_OBJ);
         }
     }
 
-    public static function query_one($sql, $instance = 'default', $data = null) {
+    public static function query_one($sql, $data = null, $instance = 'default') {
         if ($data) {
             return self::query_prepare($sql, $data, $instance);
         } else {
-            $con = Connections::get_connection('default');
+            $con = Connections::get_connection($intance);
             return $con->query($sql, \PDO::FETCH_OBJ)->fetch();
         }
     }
 
-    public static function query_prepare($sql, $arguments, $instance = 'default') {
-        $con = Connections::get_connection('default');
+    public static function query_prepare($sql, $data = Array(), $instance = 'default') {
+        $con = Connections::get_connection($intance);
         $statement = $con->prepare($sql);
-        $statement->execute($arguments);
+        $statement->execute($data);
         return $statement->fetchAll(\PDO::FETCH_OBJ);
     }
 
diff --git a/src/BBOrm/Entity.php b/src/BBOrm/Entity.php
index c626f4d..66d6365 100644
--- a/src/BBOrm/Entity.php
+++ b/src/BBOrm/Entity.php
@@ -19,10 +19,6 @@ abstract class Entity {
 
     const _properties = Array();
 
-    public function teste() {
-        return static::class;
-    }
-
     public static function get_properties() {
         $properties = Array();
         foreach (static::_properties as $propertie) {
@@ -73,7 +69,7 @@ abstract class Entity {
         $update_string = rtrim($update_string, ', ');
 
         $sql = "UPDATE " . static::table_name . " SET $update_string WHERE id = :_update_id";
-        DBInstance::execute($sql, $this->connection_name, $update_data);
+        DBInstance::execute($sql, $update_data, static::connection_name);
     }
 
     private function create() {
@@ -95,7 +91,7 @@ abstract class Entity {
         $second_argument = rtrim($second_argument, ', ');
 
         $sql = "INSERT INTO " . static::table_name . " ($first_argument) VALUES ($second_argument)";
-        DBInstance::execute($sql, static::connection_name, $insert_data);
+        DBInstance::execute($sql, $insert_data, static::connection_name);
         $this->id = DBInstance::last_insert();
     }
 
@@ -120,7 +116,7 @@ abstract class Entity {
 
     public function purge() {
         $sql = "DELETE FROM " . static::table_name . " WHERE id = :id";
-        DBInstance::execute($sql, static::connection_name, Array('id' => $this->id));
+        DBInstance::execute($sql, Array('id' => $this->id), static::connection_name);
     }
 
     private function fill($data) {
@@ -161,7 +157,7 @@ abstract class Entity {
             $sql = "SELECT $criteria FROM " . static::table_name . " $limits_sql";
         }
 
-        $results = DBInstance::query($sql, static::connection_name);
+        $results = DBInstance::query($sql, Array(), static::connection_name);
         $objects = Array();
 
         foreach ($results as $value) {
@@ -213,7 +209,7 @@ abstract class Entity {
             $sql = "SELECT COUNT(*) FROM " . static::table_name . " $criteria_sql";
         }
 
-        $results = DBInstance::query_one($sql, static::connection_name, $criteria_data);
+        $results = DBInstance::query_one($sql, $criteria_data, static::connection_name);
         return $results->count;
     }
 
@@ -272,7 +268,7 @@ abstract class Entity {
             $sql = "SELECT $select_sql FROM " . static::table_name . " $criteria_sql $limits_sql";
         }
         
-        $results = DBInstance::query($sql, static::connection_name, $criteria_data);
+        $results = DBInstance::query($sql, $criteria_data, static::connection_name);
         $objects = Array();
 
         foreach ($results as $value) {
@@ -331,7 +327,7 @@ abstract class Entity {
             $sql = "SELECT $select_sql FROM " . static::table_name . " $criteria_sql $limits_sql";
         }
 
-        $results = DBInstance::query($sql, static::connection_name);
+        $results = DBInstance::query($sql, Array(), static::connection_name);
         $objects = Array();
 
         foreach ($results as $value) {
@@ -438,7 +434,7 @@ abstract class Entity {
         }
         $sql = "SELECT $remote_in_pivot FROM $pivot_table WHERE $local_in_pivot = $this->id $limits_sql";
 
-        $relations = DBInstance::query($sql, static::connection_name);
+        $relations = DBInstance::query($sql, Array(), static::connection_name);
         $ids = Array();
         foreach ($relations as $relation) {
             $ids[] = $relation->$remote_in_pivot;
@@ -477,7 +473,7 @@ abstract class Entity {
         }
 
         $sql = "SELECT * FROM $pivot_table WHERE $local_in_pivot = $this->id $limits_sql";
-        $relations = DBInstance::query($sql, static::connection_name);
+        $relations = DBInstance::query($sql, Array(), static::connection_name);
         $objects = Array();
 
         if (empty($relations)) {