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我正在尋找一種方式來總結我的發票在另一列中的SQL,但掙扎,沒有人有一個想法如何做到這一點?提前致謝。尋找一種方法來總計我的每一個發票
SELECT I.Invoice_ID AS "Invoice ID", I.Client_ID AS "Client ID",
B.Client_Name AS "Clients Name", B.Client_Address AS "Clients Address",
I.Invoice_Date AS "Date of Invoice", B.Course_ID AS "Course ID",
C.Course_Description AS "Course Description", TO_CHAR(C.Cost, 'L9,999.99') AS "Cost",
B.Attendees_No AS "Number of Attendees", TO_CHAR(C.cost * B.Attendees_No, 'L9,999.99') AS "Total"
FROM Invoice I, Booking B, Course C
WHERE B.Client_Name = 'Central Library' AND B.Course_ID = C.Course_ID;
This is a picture of the query
您的發票總額是什麼意思? – itay
我希望每個人都有一個總計發票,在我收入的例子中,我有兩張發票,每個預訂的總數顯示在最後。我確定可以實現一個ROLLUP函數,但在如何實現它的過程中掙扎着。 –
您真的應該考慮切換到ANSI JOIN,而不是在WHERE子句中將表格串聯在一起的舊式方法。發票與您的查詢中的預訂或課程有何關係?您是否故意僅顯示單個客戶的客戶詳細信息和地址?你的預期產出是多少? – SchmitzIT