加入同一張桌子以獲得2個不同的金額值

Question

我想根據 2 個不同的帳戶代碼（1301 和 1300）獲取資金來源（dim_6）的總金額。

下面是我設計的查詢。

SELECT t.dim_6,sum(t.amount) as bvalue, sum(t1.amount) as b1value   
FROM agltransact t
LEFT OUTER JOIN agltransact t1  ON t.dim_6 =t1.dim_6 
WHERE
t.dim_6 ='AWD-000261' and t1.dim_6='AWD-000261'  and (t.period between '201801' and '202102') and (t1.period between '201801' and '202102')
and t.account = '1300' and t.voucher_type!='YE' 
and t1.account = '1301' and t1.voucher_type!='YE' 

如果我嘗試對 1 個帳戶代碼運行簡單的 SQL 查詢，則上述查詢不會返回正確的金額總和，並且與金額的值不匹配，如下所示

 select dim_6,sum(amount) from agltransact where dim_6= 'AWD-000261' and voucher_type!='YE' and period between '201801' and '202102' and account ='1300' group by dim_6

上述兩個查詢具有相同的條件，但如果我加入，金額值不匹配。

我錯過了什么？

Answer 1

我想根據 2 個不同的帳戶代碼（1301 和 1300）獲取資金來源（dim_6）的總金額。

只需使用條件聚合：

下面是我設計的查詢。

SELECT t.dim_6,
       SUM(CASE WHEN t.account = '1300' THEN t.amount END) as value_1300,
       SUM(CASE WHEN t.account = '1301' THEN t.amount END) as value_1301
FROM agltransact t
WHERE t.dim_6 = 'AWD-000261' AND
      (t.period between '201801' and '202102') AND
      t.voucher_type <> 'YE' AND
      t.account IN ('1300', '1301')
GROUP BY dim_6;

注意：我提供答案是因為我認為這是一個比其他答案更好的解決方案。

Answer 2

您的查詢不起作用的原因是假設來自t的預期記錄是1並且來自t2是2那么您將總共有2行，它將從t重復記錄兩次。 因此， sum(t.amount)將計算兩次而不是一次。 因此，您得到的值不正確。

您需要分別運行這兩個查詢並組合結果，如下所示。 我為此使用了CTE 。

;WITH t AS (
    select dim_6, sum(amount) as amount
    from agltransact 
    where dim_6= 'AWD-000261' 
        and voucher_type!='YE' 
        and period between '201801' and '202102' 
        and account ='1300' 
    group by dim_6
),
t1 AS (
    select dim_6, sum(amount) as amount
    from agltransact 
    where dim_6= 'AWD-000261' 
        and voucher_type!='YE' 
        and period between '201801' and '202102' 
        and account ='1301' 
    group by dim_6
)
select t.dim_6, t.amount as bvalue, t1.amount as b1value
from t
left outer join t1
    on t1.dim_6 = t.dim_6

---

或者，如果您想避免CTE ，您可以使用如下所示的子查詢。 將t1 cte as a sub query ，並將left join with t使用。 使用t.dim_6, t1.amount的group by by

select t.dim_6, sum(t.amount) as bvalue, t1.amount as b1value
from agltransact t
    left outer join (   
        select dim_6, sum(amount) as amount
        from agltransact 
        where dim_6= 'AWD-000261' 
            and voucher_type!='YE' 
            and period between '201801' and '202102' 
            and account ='1301' 
        group by dim_6      
    ) t1
        on t1.dim_6 = t.dim_6       
where t.dim_6= 'AWD-000261' 
    and t.voucher_type!='YE' 
    and t.period between '201801' and '202102' 
    and t.account ='1300' 
group by t.dim_6, t1.amount