UPDATE users
SET pass = users2.pass
FROM users2
WHERE users.id = users2.id;29 lip 2010
Kategoria: PostgreSQL
23 kwi 2010
Zapytanie o rekordy z dnia bieżącego + jeden dzień
select NOW()::date "2010-04-23"
select t_date from table where t_date >= NOW()::date+'1 day'::interval order by t_date limit 3"2010-04-24"
"2010-04-24"
"2010-04-24"
select t_date from table where t_date >= NOW()+'1 day'::interval order by t_date limit 3"2010-04-25"
"2010-04-25"
"2010-04-25"
12 mar 2010
Przycięcie pola typu data funkcją SUBSTRING
SELECT t_add_date,
SUBSTRING(t_add_date :: CHARACTER varying, 1, 19)
FROM TABLE
WHERE t_add_date & lt;
NOW() - '1 DAY' :: interval t_add_date SUBSTRING2010-03-10 21:26:49.928445 2010-03-10 21:26:49
2010-03-10 21:26:49.928445 2010-03-10 21:26:49
12 mar 2010
Zokrąglanie wartości w sql funkcja ROUND
SELECT
ROUND(liczba, 2) AS liczba1,
ROUND(liczba, 4) AS liczba2
FROM tabela12 mar 2010
Zapytanie do bazy z wykorzystaniem funkcji NOW()
select * from table where t_add_date < NOW()-'5 MONTH'::interval
select * from table where t_add_date < NOW()+'5 MONTH'::interval
select * from table where t_add_date < NOW()-'1 DAY'::interval
select * from table where t_add_date < NOW()-'2 DAYS'::interval
select * from table where t_add_date < NOW()-'1 DAY'::interval
select * from table where t_add_date < NOW()-'5 MINUTES'::interval
select * from table where t_add_date < NOW()-'3 HOURS'::interval