Question

Say i have a table ‘users’, with ‘user_id’, ‘name’ and ‘multiplier’.

If I do a basic select, I get one row for each user:

SELECT * FROM users

What I would like to do now, is to get mutiplier rows for each user. So if I have say two users in my table which those values

(1, 'user1', 1)
(2, 'user2', 6)

What I would like to get is a select that would return me 7 rows (1 x user1 and 6 x user2)

I realize that this is very easy to do on the client side, but this will be part of a much larger query and I can’t afford to send the thousands of rows affected on the client to then multiply and sort and every other things I’m doing with it next …

Thanks to anyone that can help

Answer 1

I think that you’d be much better off posting the entirety of what you’re trying to solve, because there is likely a cleaner way than what you’re trying to do, but the code below should do what you need. I use a Numbers table here. You can create that as a table variable or a permanent table or a temporary table, but the idea remains the same:

SELECT
     U.user_id,
     U.name,
     U.multiplier
FROM
     Users AS U
INNER JOIN Numbers AS N ON
     N.number BETWEEN 1 AND U.multiplier