加入問題上的SQL請求

Question

我的數據庫：

TB_DW_VAB_FLIGHT : ID_TEC_FLIGHT 
    TB_DW_VAB_SALES : QUANTITY, TRANSACTION_NUMBER, UNIT_SALES_PRICE 

我想有4列作爲結果的表：CA，QTE，NB_TRANSACTION和NB_VOLS在同一個月。 （N-1）

我試着像這樣的SQL請求：

SELECT 
    sum(QUANTITY*UNIT_SALES_PRICE) as CA, 
    sum(QUANTITY) as QTE, 
    count(distinct TRANSACTION_NUMBER) as NB_TRANSACTION, 
    count(distinct ID_TEC_FLIGHT) as NB_VOLS 
FROM TB_DW_VAB_SALES, TB_DW_VAB_FLIGHT 
where to_char(TB_DW_VAB_SALES.FLIGHT_DATE,'MM')=to_char(current_date,'MM')-1 and to_char(TB_DW_VAB_SALES.FLIGHT_DATE,'YYYY')=to_char(current_date,'YYYY') and SALES_TYPE='SALES' 
and to_char(TB_DW_VAB_FLIGHT.FLIGHT_DATE,'MM')=to_char(current_date,'MM')-1 and to_char(TB_DW_VAB_FLIGHT.FLIGHT_DATE,'YYYY')=to_char(current_date,'YYYY'); 

但甲骨文能不能給我一個答案。

非常感謝您的幫助。

Answer 1

嘗試

with CTE1 as 
(
select to_char(FLIGHT_DATE, 'MM-YYYY') as PERIOD, 
     sum(QUANTITY*UNIT_SALES_PRICE) as CA, 
     sum(QUANTITY) as QTE, 
     count(distinct TRANSACTION_NUMBER) as NB_TRANSACTION 
from TB_DW_VAB_SALES 
where SALES_TYPE = 'SALES' 
group by to_char(FLIGHT_DATE, 'MM-YYYY') 
) 
, CTE2 as 
(
select count(distinct ID_TEC_FLIGHT) as NB_VOLS, 
     to_char(FLIGHT_DATE, 'MM-YYYY') as PERIOD 
from TB_DW_VAB_FLIGHT 
group by to_char(FLIGHT_DATE, 'MM-YYYY') 
) 
select CTE1.CA, 
     CTE1.QTE, 
     CTE1.NB_TRANSACTION, 
     CTE2.NB_VOLS 
from CTE1 
inner join CTE2 on CTE1.PERIOD = CTE2.PERIOD 
where CTE1.PERIOD = to_char(add_Months(sysdate,-1),'MM-YYYY') 

，或者如果CTE的軟件中的不可用：

select CTE1.CA, 
     CTE1.QTE, 
     CTE1.NB_TRANSACTION, 
     CTE2.NB_VOLS 
from 
(
select to_char(FLIGHT_DATE, 'MM-YYYY') as PERIOD, 
     sum(QUANTITY*UNIT_SALES_PRICE) as CA, 
     sum(QUANTITY) as QTE, 
     count(distinct TRANSACTION_NUMBER) as NB_TRANSACTION 
from TB_DW_VAB_SALES 
where SALES_TYPE = 'SALES' 
group by to_char(FLIGHT_DATE, 'MM-YYYY') 
) CTE1 
inner join 
(
select count(distinct ID_TEC_FLIGHT) as NB_VOLS, 
     to_char(FLIGHT_DATE, 'MM-YYYY') as PERIOD 
from TB_DW_VAB_FLIGHT 
group by to_char(FLIGHT_DATE, 'MM-YYYY') 
) CTE2 
    on CTE1.PERIOD = CTE2.PERIOD 
where CTE1.PERIOD = to_char(add_Months(sysdate,-1),'MM-YYYY')