//get extent

select
  xmin(extent(the_geom)),
  ymin(extent(the_geom)),
  xmax(extent(the_geom)),
  ymax(extent(the_geom))
                        from "ba_pa"

//distinct with many tables

Select distinct on ("domin", "subdom") "domin", "subdom"  from dominios order by subdom


//update table ponto with IMG_PERFIL

UPDATE "PONTO" 	
SET "IMG_PERFIL" = 	( SELECT "Tab_IMAGE"."IMG_PERFIL"
FROM "Tab_IMAGE"
WHERE "Tab_IMAGE"."IDT_PONTO" = "PONTO"."IDT_PONTO")