我寫下面的查詢是沒有任何錯誤消息但是我看到的問題與輸出返回輸出: select productid, productname, categoryid, unitprice
FROM production.products as PP
where unitprice in (select min(unitprice) as minprice
from production.pr
我有被簡化爲這個問題的下述結構的數據幀。 A B C D E
0 2014/01/01 nan nan 0.2 nan
1 2014/01/01 0.1 nan nan nan
2 2014/01/01 nan 0.3 nan 0.7
3 2014/01/02 nan 0.4 nan nan
4 2014/01/02 0.5 nan 0.6 0.8
我在這裏是一個單獨的幾個時間戳
我有一個查詢,得到每個項目的總和,但是當我改變SUM(d.AMT)到(SUM(d.AMT) * e.EXCHANGE_RATE) [USD Amount]總換算成美元我遇到的錯誤的: Column 'EXCHANGE_RATE.EXCHANGE_RATE' is invalid in the select list because it is not contained in either an
之一查找並更新非重複記錄我想找到所有非重複記錄並更新其中一列。 Ex。 Col_1 | Col_2 | Col_3 | Col_4 | Col_5
A | AA | BB | 1 |
A | AB | BC | 2 |
A | AC | BD | 3 |
B | BB | CC | 1 |
B | BB | CC | 2 |
C | CC | DD | 1 |