test=*# select * from jessi ;
d
------------
2013-01-01
2013-02-01
2013-03-01
2013-03-20
2013-03-21
2013-04-01
(6 rows)
test=*# select * from jessi where extract(week from d) = extract(week from current_date);
d
------------
2013-03-20
2013-03-21
(2 rows)