create table users ( id serial not null primary key, photo varchar, name varchar, wezipe varchar, email varchar not null unique, encryptedpassword varchar not null, qrcode varchar, role varchar );
create table product ( id serial not null primary key, name varchar, cost real, alynanbaha real, sany real, shtrixcode integer unique );
create table statistic ( id bigserial not null primary key, satylansany real, totalcost real );
update product set sany = sany + $1 where shtrixcode = $2 returning *