--> keys <-- login : admin||app_name : venta_alicuota||--> fields <-- priv_access (old)  : ||priv_access (new)  : Y||priv_insert (old)  : ||priv_insert (new)  : N||priv_delete (old)  : ||priv_delete (new)  : N||priv_update (old)  : ||priv_update (new)  : N||priv_export (old)  : ||priv_export (new)  : N||priv_print (old)  : ||priv_print (new)  : N