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我试图选择一次行,有(一些指定)与上一行相同的值。比较行与上一行
我可以选择我想要像下面这样:
SELECT dpr_ts
, dpr_open
, dpr_volume
, LAG(dpr_open, 1, 0) over(ORDER BY dpr_ts) AS po
, LAG(dpr_close, 1, 0) over(ORDER BY dpr_ts) AS pc
, LAG(dpr_volume, 1, 0) over(ORDER BY dpr_ts) AS pv
FROM dpr
ORDER BY dpr_ts;
如何,可以指定在where子句中,只有重复应该出现?
我的意思是我想是这样(这doent工作,但把它只让你一个想法是什么我想要):
SELECT dpr_ts
, dpr_open
, dpr_volume
, LAG(dpr_open, 1, 0) over(ORDER BY dpr_ts) AS po
where po = dpr_volume;
感谢 问候