Hi,
2009/2/2 Gilles Ganault <nos...@nospam.com>:
> Thanks guys. For those interested, here's how to perform the
> conversion from DD/MM/YYYY to YYYY-MM-DD:
as suggested, the DBA should seriously think about defining the
correct type of the column here, for intermediate use and getting
stuff to work you could use a view and define some stored procedures
on it so that inserting properly works...
---snip plain psql---
test=# CREATE table date_test(
id serial primary key,
the_date timestamp with time zone,
stuff Text
);
NOTICE: CREATE TABLE will create implicit sequence "date_test_id_seq"
for serial column "date_test.id"
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index
"date_test_pkey" for table "date_test"
CREATE TABLE
test=# INSERT INTO date_test (the_date) VALUES ('20091231');
INSERT 0 1
test=# INSERT INTO date_test (the_date) VALUES ('20081231');
INSERT 0 1
test=# INSERT INTO date_test (the_date) VALUES ('20071231');
INSERT 0 1
test=# SELECT * from date_test;
id | the_date | stuff
----+------------------------+-------
1 | 2009-12-31 00:00:00+01 |
2 | 2008-12-31 00:00:00+01 |
3 | 2007-12-31 00:00:00+01 |
(3 rows)
---snap plain psql---
---snip now in python---
from datetime import datetime
d = datetime(day=21, month=21, year=2008) # use a real datetime
without string fiddling
import psycopg2
db = psycopg2.connect(host='localhost', user='test', password='test',
database='test')
cursor = db.cursor()
cursor.execute("select * from date_test where the_date < '20080221'")
# OK simple SELECT
for row in cursor:
print row
# (3, datetime.datetime(2007, 12, 31, 0, 0,
tzinfo=<psycopg2.tz.FixedOffsetTimezone object at 0x959fe0c>), None)
## kill SQL injection stuff, also personally I find this more
convenient that fiddling with strings...
cursor.execute("select * from date_test where the_date < %s", (d, ))
for row in cursor:
print row
(3, datetime.datetime(2007, 12, 31, 0, 0,
tzinfo=<psycopg2.tz.FixedOffsetTimezone object at 0x959fe8c>), None)
---snap now in python---
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