How to use a CTE in a CASE statement?

Question

Hi everyone,
I'm trying to use a CTE in a CASE statement and getting error. In fact, I'm not sure how to use a CTE in this case and this is the first time I'm using a CTE. I managed to build a CTE successfully but, failed to incorporate it in the CASE statement.
SELECT wbs,
MIN(srt),
MAX(srt)
CASE ust
WHEN
WITH CTE AS
SELECT p_id + p_name + ps_name AS colg, p_id
FROM pd_info
WHERE s_desc = 'warehouse'
OR p_desc = 'Originated from warehouse'
OR p_desc = 'Originated from a partner store'
SELECT colg FROM CTE
WHERE cte.colg IN (SELECT p_id + p_name + ps_name AS c
omb from pd_info)
OR cte.p_id = 'xxxxxxxx' THEN 'invalid'
ELSE 'valid'
END,
p_name,
sub_name,
ps_name,
FROM pd_info;
Could experts here please help me?
Thank you,
Bangaaram
Known is a DROP, Unknown is an OCEAN.

Answer 1

With the help from some experts, I've figured out that CTE doesn't work in this case. Here are the queries that I'm using for the above. Either of them is working good so far.
SELECT Wbs
, MIN ( Srt )
, MAX ( Srt )
, CASE
WHEN S_Desc = 'warehouse'
OR P_Desc = 'Originated from warehouse'
OR P_Desc = 'Originated from a partner store'
OR P_Id = 'xxxxxxxx'
THEN 'invalid'
ELSE 'valid'
END AS Ust
, P_Name
, Sub_Name
, Ps_Name
FROM Pd_Info
GROUP BY Wbs
, CASE
WHEN S_Desc = 'warehouse'
OR P_Desc = 'Originated from warehouse'
OR P_Desc = 'Originated from a partner store'
OR P_Id = 'xxxxxxxx'
THEN 'invalid'
ELSE 'valid'
END
, P_Name
, Sub_Name
, Ps_Name;
SELECT wbs,
MIN(srt),
MAX(srt)
CASE
WHEN cte.p_id = 'xxxxxxxx'
or exists
(select *
from pd_info p2
WHERE (s_desc = 'warehouse'
OR p_desc = 'Originated from warehouse'
OR p_desc = 'Originated from a partner store' )
and p2.p_id = p1.p_id and p2.p_name = p1.p_name and p2.ps_name = p1.ps_name
THEN 'invalid'
ELSE 'valid'
END ust,
p_name,
sub_name,
ps_name,
FROM pd_info p1;
Thank you,
Bangaaram
Known is a DROP, Unknown is an OCEAN.