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我有三個表如下面的截圖: 查詢三個表輸出什麼
但是,當我想執行下面的查詢,我沒有得到任何結果,即使是在所有三個表中的數據:
這裏是所生成的代碼:
SELECT Clients.ClientID, Clients.FirstName, Clients.Surname, Clients.Internal, Clients.Organisation, Clients.LandlineNo, Clients.MobileNo, Clients.Address1, Clients.Town,
Clients.Postcode, Clients.Email, Clients.NHS, Clients.PurchaseOrderNumber, Bookings.Date, Bookings.Timebegan, Bookings.Timefinished, Bookings.Price,
Bookings.Repeats, Bookings.Rweeks, Bookings.Rdays, Bookings.Rmonths, Bookings.Occurrences, Rooms.Roomname
FROM Clients INNER JOIN
Bookings ON Clients.ClientID = Bookings.ClientID INNER JOIN
Rooms ON Bookings.RoomID = Rooms.RoomID
由於您正在使用內部連接,所有表都需要包含數據。嘗試將連接更改爲左外部連接並查看是否獲得了您正在查找的結果。 – 2013-03-17 23:31:02
非常感謝您的幫助 – Hamoudy 2013-03-17 23:47:50