我在MYSQL工作臺中嘗試了這個命令,以選擇在不同日期訂購的同一客戶(同一客戶ID)的訂單:但它工作不正常:這是錯誤嗎?從在不同日期訂購的相同客戶中選擇訂單
SELECT * FROM Table1 WHERE customerID = customerID AND shipmentDate != shipmentDate;
感謝您的支持!
我在MYSQL工作臺中嘗試了這個命令,以選擇在不同日期訂購的同一客戶(同一客戶ID)的訂單:但它工作不正常:這是錯誤嗎?從在不同日期訂購的相同客戶中選擇訂單
SELECT * FROM Table1 WHERE customerID = customerID AND shipmentDate != shipmentDate;
感謝您的支持!
SELECT * FROM Table T1,TABLE T2 WHERE T1.customerID = T2.customerID AND T1.shipmentDate <> T2.shipmentDate;
'SELECT * FROM Table1 WHERE customerID = customerID'should do it。另外定義「* not working correctly *」 – asprin
ok - 這只是一個例子:我想知道,爲什麼「shipmentDate!= shipmentDate」工作不正常 – AbsoluteBeginner