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我有一個列的SQL Server表:如何聚合價格OHLC數據
ID, START_DTTM, OPEN, HIGH, LOW, CLOSE
我必須每小時彙總數據。
所以,我想這個查詢:
SELECT
ID,
MIN(START_DTTM) START_DTTM,
MAX(HIGH) AS HIGH,
MIN(LOW) AS LOW
FROM
MY_TABLE
GROUP BY
ID, DATEPART(DAY, START_DTTM), DATEPART(HOUR, START_DTTM)
和它的作品,但我不能拉打開和關閉。
我想是這樣的:
FIRST_VALUE(OPEN_PRICE) OVER (PARTITION BY
DATEPART(DAY, START_DTTM), DATEPART(HOUR, START_DTTM) ORDER BY START_DTTM)
,當然,這是行不通的。我能做什麼?