Question

I’m not sure if it’s possible but I’m trying to do an insert while selecting for a value to do a +1. The reason I’m doing this is because my column is auto increments, but the values are all over the places.

Here’s what I have so far and it won’t let me do the insert:

insert into channels set chanid=(select chanid from channels where parent=2
order by chanid desc limit 1)+1

Answer 1

Try using an alias in the sub-query. It did the trick for me.

insert into channels
set chanid=(
    select c.chanid
    from channels as c
    where c.parent=2
    order by c.chanid desc
    limit 1
)+1

Reference: http://bugs.mysql.com/bug.php?id=6980