diff --git a/pandora_console/pandoradb.oracle.sql b/pandora_console/pandoradb.oracle.sql
index 2b60a1d3cb..fc1123908c 100755
--- a/pandora_console/pandoradb.oracle.sql
+++ b/pandora_console/pandoradb.oracle.sql
@@ -57,28 +57,28 @@ CREATE OR REPLACE TRIGGER taddress_agent_inc BEFORE INSERT ON taddress_agent REF
 CREATE TABLE tagente (
 	id_agente NUMBER(10, 0) PRIMARY KEY,
 	nombre VARCHAR2(600) DEFAULT '',
-	direccion VARCHAR2(100) DEFAULT NULL,
+	direccion VARCHAR2(100) DEFAULT '',
 	comentarios VARCHAR2(255) DEFAULT '',
 	id_grupo NUMBER(10, 0) DEFAULT 0,
-	ultimo_contacto TIMESTAMP DEFAULT NULL,
+	ultimo_contacto TIMESTAMP DEFAULT to_timestamp('1970-01-01 00:00:00', 'yyyy-mm-dd hh24:mi:ss'),
 	modo NUMBER(5, 0) DEFAULT 0,
 	intervalo NUMBER(10, 0) DEFAULT 300,
 	id_os NUMBER(10, 0) DEFAULT 0,
 	os_version VARCHAR2(100) DEFAULT '',
 	agent_version VARCHAR2(100) DEFAULT '',
-	ultimo_contacto_remoto TIMESTAMP DEFAULT NULL,
+	ultimo_contacto_remoto TIMESTAMP DEFAULT to_timestamp('1970-01-01 00:00:00', 'yyyy-mm-dd hh24:mi:ss'),
 	disabled NUMBER(5, 0) DEFAULT 0,
 	id_parent NUMBER(10, 0) DEFAULT 0,
 	custom_id VARCHAR2(255) DEFAULT '',
 	server_name VARCHAR2(100) DEFAULT '',
 	cascade_protection NUMBER(5, 0) DEFAULT 0, 
 	--number of hours of diference with the server timezone
-	timezone_offset NUMBER(5, 0) DEFAULT 0 NULL,
+	timezone_offset NUMBER(5, 0) DEFAULT 0,
 	 --path in the server to the image of the icon representing the agent
-	icon_path VARCHAR2(127) DEFAULT NULL NULL ,
+	icon_path VARCHAR2(127) DEFAULT '',
 	 --set it to one to update the position data (altitude, longitude, latitude) whenetting information from the agent or to 0 to keep the last value and don\'t update it
 	update_gis_data NUMBER(5, 0) DEFAULT 1,
-	url_address CLOB DEFAULT '' NULL,
+	url_address CLOB DEFAULT '',
 	quiet NUMBER(5, 0) DEFAULT 0,
 	normal_count NUMBER(20, 0) DEFAULT 0,
 	warning_count NUMBER(20, 0) DEFAULT 0,
@@ -216,7 +216,7 @@ CREATE TABLE tagente_modulo (
 	plugin_pass CLOB DEFAULT '',
 	plugin_parameter CLOB DEFAULT '',
 	id_plugin NUMBER(10, 0) DEFAULT 0,
-	post_process BINARY_DOUBLE DEFAULT NULL,
+	post_process BINARY_DOUBLE DEFAULT 0,
 	prediction_module NUMBER(19, 0) DEFAULT 0,
 	max_timeout NUMBER(10, 0) DEFAULT 0,
 	max_retries NUMBER(10, 0) DEFAULT 0,