我有这个连接sql语句，但我似乎无法得到我想要的输出

Question

SELECT * FROM tblcheck as ch 
INNER JOIN 
rooms as r on ch.room_id = r.room_id
INNER JOIN
roomtype as c on c.RoomType_id = r.RoomType_id
INNER JOIN
guest as g on g.room_id = ch.room_id

我想要的输出是显示这个

Guest Name || Room Name || Roomtype || Check-in Date and Time

但我在访客名称中有错误。它显示了访客表中的每个人:(请帮助我

Answer 1

如果我们知道表结构，会更容易提供帮助。到返回的列，您可以选择如下所示：

SELECT
    g.name
   ,r.name
   ,r.roomtype
   ,ch.checkInDate
   ,ch.time
FROM
    tblcheck as ch 
INNER JOIN 
    rooms as r on ch.room_id = r.room_id
INNER JOIN
    roomtype as c on c.RoomType_id = r.RoomType_id
INNER JOIN
    guest as g on g.room_id = ch.room_id