Using a scalar variable inside a CTE - sql

Question

I am reviewing someone else's code but I've hit a wall. When I try to execute the provided script I get the following error:
Must declare the scalar variable "#userId".
I tried to remove the semicolon on line 2 just to try things but that give me the following error:
Incorrect syntax near the keyword 'with'. If this statement is a common table expression, an xmlnamespaces clause or a change tracking context clause, the previous statement must be terminated with a semicolon.
I'm very confused by this because this exact piece of code works on machines of others, but not on mine. I know there are other ways to write this query but I need to get this to work. Is there any way to make the variable work as intended in this script without rewriting the whole thing?
I'm using Microsoft SQL Server 2019 (RTM-CU8) (KB4577194) - 15.0.4073.23 (X64) on Ubuntu 18.04.4 LTS.
DECLARE #userId int
SET #userId =:user_id;
WITH bidsplacedtotal AS (
SELECT amount, user_id, auction_id
FROM bids WHERE user_id = #userId
)
,bidsreceivedtotal AS (
SELECT amount, user_id, auction_id
FROM bids WHERE auction_id IN
(SELECT id FROM auctions WHERE user_id = #userId)
)
SELECT COUNT(amount) FROM bidsplacedtotal) AS placed_total
UNION
SELECT COUNT(amount) FROM bidsreceivedtotal) AS received_total

Answer 1

Try this code to see if it works:
DECLARE #userId int
SELECT #userId = 2091
;WITH bidsplacedtotal AS (
SELECT amount, user_id, auction_id
FROM bids WHERE user_id = #userId
)
,bidsreceivedtotal AS (
SELECT amount, user_id, auction_id
FROM bids WHERE auction_id IN
(SELECT id FROM auctions WHERE user_id = #userId)
)
SELECT COUNT(amount) as CountAmount FROM bidsplacedtotal) AS placed_total
UNION
SELECT COUNT(amount) as CountAmount FROM bidsreceivedtotal) AS received_total