我有一张这样的桌子:
Number Price Type Date Time
------ ----- ---- ---------- ---------
23456 0,665 SV 2014/02/02 08:00:02
23457 1,3 EC 2014/02/02 07:50:45
23460 0,668 SV 2014/02/02 07:36:34
23461 0,668 SV 2014/02/02 07:37:34
23462 0,668 SV 2014/02/02 07:38:34
23463 0,668 SV 2014/02/02 07:39:34
对于每条记录,我需要上一个/下一个价格。在这种情况下,查询很简单。
Select Lag(price) over (order by date desc, time desc),
Lead(price) over (order by date desc, time desc)
from ITEMS
但我需要结果 Where Next price <> record price
我的查询是
Select Lag(price) over (order by date desc, time desc) Nxt_Price,
Lead(price) over (order by date desc, time desc) Prv_Price
from ITEMS
Where Nxt_Price <> price
但它拒绝使用该变量