我有一份来自商品交易所的历史交易的谨慎列表,其中包含日期时间和值,例如
tradeTime | price
-----------------------------------
2014-06-11T00:21:12+02:00 | 647.24
2014-06-11T00:23:12+02:00 | 700.18
2014-06-11T00:28:12+02:00 | 750.23
2014-06-11T00:40:00+02:00 | 767.81
2014-06-11T00:51:12+02:00 | 711.46
现在我希望能够每小时创建一个价格列表。所以三种逻辑可能性是:
- 该期间有 1 笔交易 - 太好了,这就是价格(开盘价和收盘价)
- 有多个交易 - 第一个是开盘价,最后一个是收盘价
- 没有交易 - 开盘价和收盘价应为该期间之前的最新交易。
因此,对于上面的示例,查看 10 分钟的增量,输出应该类似于:
period | open | close
--------------------------------
00:20 -> 00:30 | 648.24 | 750.23
00:30 -> 00:40 | 750.23 | 767.81
00:40 -> 00:50 | 767.81 | 711.46
-
SELECT * FROM sales BETWEEN From_date AND To_date
可能用MIN()
、MAX()
作为日期来选择价格?我不确定这一切如何与
最佳答案
尝试这个查询:
WITH qq AS (
SELECT cast('2014-06-11T00:00:00' as datetime) as startTime,
dateadd( minute, 10, cast('2014-06-11T00:00:00' as datetime)) as endTime
UNION ALL
SELECT endTime, dateadd( minute, 10, endTime )
FROM qq
WHERE endTime < cast('2014-06-12T00:00:00' as datetime)
)
SELECT startTime, endTime,
coalesce( opening, opening1 ) as opening,
coalesce( closing, opening, opening1 ) as closing
FROM (
SELECT qq.startTime, qq.endTime,
(SELECT TOP 1 price FROM table1 t1
WHERE t1.tradeTime >= qq.startTime AND t1.tradeTime < qq.endTime
ORDER BY t1.tradeTime ) As opening,
(SELECT TOP 1 price FROM table1 t1
WHERE t1.tradeTime >= qq.startTime AND t1.tradeTime < qq.endTime
ORDER BY t1.tradeTime DESC ) As closing,
(SELECT TOP 1 price FROM table1 t1
WHERE t1.tradeTime < qq.startTime
ORDER BY t1.tradeTime DESC ) as opening1
FROM qq
) x
option (maxrecursion 0)
演示:http://sqlfiddle.com/#!18/b9363/6
| startTime | endTime | opening | closing |
|----------------------|----------------------|---------|---------|
| 2014-06-11T00:00:00Z | 2014-06-11T00:10:00Z | (null) | (null) |
| 2014-06-11T00:10:00Z | 2014-06-11T00:20:00Z | (null) | (null) |
| 2014-06-11T00:20:00Z | 2014-06-11T00:30:00Z | 647.24 | 750.23 |
| 2014-06-11T00:30:00Z | 2014-06-11T00:40:00Z | 750.23 | 750.23 |
| 2014-06-11T00:40:00Z | 2014-06-11T00:50:00Z | 767.81 | 767.81 |
| 2014-06-11T00:50:00Z | 2014-06-11T01:00:00Z | 711.46 | 711.46 |
| 2014-06-11T01:00:00Z | 2014-06-11T01:10:00Z | 711.46 | 711.46 |
| 2014-06-11T01:10:00Z | 2014-06-11T01:20:00Z | 711.46 | 711.46 |
| 2014-06-11T01:20:00Z | 2014-06-11T01:30:00Z | 711.46 | 711.46 |
| 2014-06-11T01:30:00Z | 2014-06-11T01:40:00Z | 711.46 | 711.46 |
| 2014-06-11T01:40:00Z | 2014-06-11T01:50:00Z | 711.46 | 711.46 |
| 2014-06-11T01:50:00Z | 2014-06-11T02:00:00Z | 711.46 | 711.46 |
...
...
...
关于sql - 从交易列表中确定谨慎时期的价格,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48850310/