MySQL：按ID选择行，更改ID，然后将其插入另一个表

Question

I have two tables, A and B.

I'd like to select a row from B based on it's Primary Key, alter the primary key to a different value, and then insert this row into A.

Something like this:

INSERT INTO A SELECT id, title, date FROM B WHERE B.id="4" UPDATE B SET id="5";

Is there a solution for this?

Answer 1

INSERT INTO A(id, title, date)
SELECT 5 AS id, title, date FROM B WHERE B.id="4";
#      ^--- here is the trick

Answer 2

也许像

insert into a (select id as "new_id", title, date from b where b.id="4")