我在MYSQL工作台中尝试了这个命令,以选择在不同日期订购的同一客户(同一客户ID)的订单:但它工作不正常:这是错误吗?从在不同日期订购的相同客户中选择订单
SELECT * FROM Table1 WHERE customerID = customerID AND shipmentDate != shipmentDate;
感谢您的支持!
我在MYSQL工作台中尝试了这个命令,以选择在不同日期订购的同一客户(同一客户ID)的订单:但它工作不正常:这是错误吗?从在不同日期订购的相同客户中选择订单
SELECT * FROM Table1 WHERE customerID = customerID AND shipmentDate != shipmentDate;
感谢您的支持!
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。另外定义“* not working correctly *” – asprin
ok - 这只是一个例子:我想知道,为什么“shipmentDate!= shipmentDate”工作不正常 – AbsoluteBeginner