Question

任何人都可以告诉我这个查询有什么问题吗？

String squery="update Room set GuestDetails.GuestCode=Room.GuestCode, GuestDetails.Title=Room.Title, GuestDetails.FirstName=Room.FirstName, GuestDetails.LastName=Room.LastName, GuestDetails.Country=Room.Country, GuestDetails.State=Room.State, GuestDetails.City=Room.City, GuestDetails.ContactNo=Room.ContactNo from GuestDetails inner join Room on Room.RoomNo="+rn+" and GuestCode="+gc+"";

我正在尝试更新Room并从GuestDetails中设置值。如果我输入GuestCode = 1，则GuestCode 1的访客应设置为RoomNo 101.请帮助我。

Answer 1

我没有您的表格结构或数据，但请尝试如下

UPDATE Room
   SET GuestDetails.GuestCode = Room.GuestCode,
       GuestDetails.Title = Room.Title,
       GuestDetails.FirstName = Room.FirstName,
       GuestDetails.LastName = Room.LastName,
       GuestDetails.Country = Room.Country,
       GuestDetails.State = Room.State,
       GuestDetails.City = Room.City,
       GuestDetails.ContactNo = Room.ContactNo
 where GuestDetails inner join Room on Room.RoomNo="+rn+" and GuestCode="+gc+

使用where代替from

更新查询以设置另一个表中的值

1 个答案: