Question

我有这样的查询：

SELECT 
    TC.F_Exhibition_Name,
    T.F_Exhibitor_Name,
    TC.F_CreditNoteNo,
    TC.F_Description,
    TC.F_Price,
    TC.F_Qty,
    TC.F_CNqty,
    TC.F_Totalamt 
FROM T_CreditNote TC 
LEFT JOIN T_Exhibitor T ON 
    T.F_Exhibitor_Name = TC.F_Exhibitor_Name 
WHERE TC.F_CreditNoteNo='CNINV100002'

输出看起来像这样

----------------------------------------------------------------------------------------------------------------------------------------------------
F_Exhibition_Name   F_Exhibitor_Name                            F_CreditNoteNo  F_Description   F_Price      F_Qty        F_CNqty      F_Totalamt                                    
----------------------------------------------------------------------------------------------------------------------------------------------------
WORKSPACE 2015      AEP - Associacao Empresarial De Portugal    CNINV100002     item1                12          5             8               96 
WORKSPACE 2015      AEP - Associacao Empresarial De Portugal    CNINV100002     item2                25          12            10             250

我希望最后添加一列[sum]，其中F_total金额之和。就我而言，我想展示sum(250+96) = 346。

我怎么能这样做？

Answer 1

使用sorted_x1 = sorted(dt.items(), key=lambda k_v: (k_v[1]['score'], k_v[0]))：

SUM OVER()

select TC.F_Exhibition_Name, T.F_Exhibitor_Name, TC.F_CreditNoteNo, TC.F_Description, TC.F_Price,TC.F_Qty, TC.F_CNqty, TC.F_Totalamt, sum(TC.F_Totalamt) OVER () AS SumOfTotalamt from T_CreditNote TC LEFT JOIN T_Exhibitor T on T.F_Exhibitor_Name=TC.F_Exhibitor_Name where TC.F_CreditNoteNo='CNINV100002'的窗口版本将两行都返回SUM的总和。

Answer 2

您可以使用SUM()聚合函数，例如

SELECT 
    TC.F_Exhibition_Name,
    T.F_Exhibitor_Name,
    TC.F_CreditNoteNo,
    TC.F_Description,
    TC.F_Price,
    TC.F_Qty,
    TC.F_CNqty,
    TC.F_Totalamt,
    SUM(TC.F_Totalamt) as sum_amt 
FROM T_CreditNote TC 
LEFT JOIN T_Exhibitor T ON 
    T.F_Exhibitor_Name = TC.F_Exhibitor_Name 
WHERE TC.F_CreditNoteNo='CNINV100002'
GROUP BY  TC.F_Exhibition_Name,
    T.F_Exhibitor_Name,
    TC.F_CreditNoteNo,
    TC.F_Description,
    TC.F_Price,
    TC.F_Qty,
    TC.F_CNqty,
    TC.F_Totalamt

如何获取列中多个记录的总和

2 个答案: