Использование SQL функции EXTRACT для возвращения одной части даты / времени
29.12.2011
Синтаксис:
EXTRACT(unit FROM date)
Значения unit:
| Unit Value |
|---|
| MICROSECOND |
| SECOND |
| MINUTE |
| HOUR |
| DAY |
| WEEK |
| MONTH |
| QUARTER |
| YEAR |
| SECOND_MICROSECOND |
| MINUTE_MICROSECOND |
| MINUTE_SECOND |
| HOUR_MICROSECOND |
| HOUR_SECOND |
| HOUR_MINUTE |
| DAY_MICROSECOND |
| DAY_SECOND |
| DAY_MINUTE |
| DAY_HOUR |
| YEAR_MONTH |
Пример:
1 |
SELECT *, EXTRACT(MONTH FROM date1) AS m FROM items WHERE publish = 1 GROUP BY m HAVING EXTRACT(DAY FROM date1) = "03" OR EXTRACT(MONTH FROM date1) = "09" ORDER BY date1 |