如何将每个现有 ID 的行插入到同一个表中？

Question

I have table users_settings where I store settings for each user. In the following table you can see there are settings for two users 78 and 79 .

Now I want to add one more row each two users, key = 'app_reminder' . So is there any way to do it by query or I will have to use php script for it.

I would appreciate if someone guide me about it. Thank you

Answer 1

You can use insert. . . select insert. . . select insert. . . select :

insert into users_settings (user_id, key)
    select distinct user_id, 'app_reminder'
    from users_settings;

Note: This assumes that id is assigned automatically.

If you specifically only want this for those two users, you could add where user_id in (78, 79) or use:

insert into users_settings (user_id, key)
    select uuser_id, 'app_reminder'
    from (select 78 as user_id union all select 79) u;