Question

我的第一张表将是包含我希望插入的列状态，目的地，渡轮的港口我的第二个表是用户名，我希望插入用户名

我如何使用insert语句并在表Booking中插入所有这些列？

   private static final String DATABASE_CREATE =
        "create table user (_id integer primary key autoincrement, "
        + "Username text not null, Password text not null,"
        + "LastName text not null, FirstName text not null);";

    private static final String DATABASE_CREATE_2 =
        "create table port (_id integer primary key autoincrement, "
        + "status text null, destination text null,"
        + "arrival text null, ferry text null);";

    private static final String DATABASE_CREATE_3 =
        "create table booking (_id integer primary key autoincrement, "
        + "ArrivalTime text null, Destination text null,"
        + "user text null, ferry text null);";

谢谢。

Answer 1

我在Oracle中尝试了这个，它应该可以工作：

INSERT INTO booking (ArrivalTime, Destination, user, ferry) 
SELECT port.arrival, port.destination, user.Username, port.ferry 
FROM port, user WHERE port._id Is Not Null

请注意，您需要一个始终为true的WHERE子句来添加所有可能的条目

Answer 2

sql server 2008： -

insert into booking 
select p.arravialtime,p.destination,u.username,p.ferry
from port p
(most sutaible join according to your requirenment)
 user u
  where (your condition)

如何从其他2个表中将数据插入1个表中？

2 个答案: