update contact set birthday=
to_date('19'||substr(pin,7,2)||'-' || substr(pin,9,2)||'-'||substr(pin,11,2),'YYYY-MM-DD')
where length(pin)=15
to_date('19'||substr(pin,7,2)||'-' || substr(pin,9,2)||'-'||substr(pin,11,2),'YYYY-MM-DD')
where length(pin)=15
to_date('19'||substr(pin,7,2)||substr(pin,9,2)||substr(pin,11,2),'YYYYMMDD')
where length(pin)=15