Question

This can easily be scripted, but I would like to learn how to do it in just pure SQL. I have a users table. In the users table, id is the primary key. Now imagine I have a new table called foos. Each user can have one foo. I’d like to be able to create a row (doesn’t matter if data is the same right now) for every user I have in the users table into the table foos. foos just has just two columns, user_id,name.

What’s the best way to loop through users and create an accompanying row in foos for each user where user_id is the user.id and name is any random string.

Answer 1

insert into foo (user_id, name)
select id, SomeStringInUserThatDoesntMatter 
from users

OR

insert into foo (user_id, name)
select id, 'This fixed string'
from users

OR (with a little bit of fun)

insert into foo (user_id, name)
select id, '4'
from users

since,