text: delete from table producto;  
  delete from table libros;  
  delete from table hogar;  
  delete from table textil; 
  delete from table fotografia;   
  delete from table almacen;
  delete from table usuario;
  delete from table direccion;
  delete from table palabra_clave;  
  delete from table esta_en;  
  delete from table contiene;  
  delete from table busqueda; 
  delete from table asociado;   
  delete from table compra;