SQL & PL/SQL

Hi everyone,

This is my first time to use case statement in a multiple query. I have tried to implement it but i got no luck.. Please see below

set define off

SELECT g.GROUP_NAME as Market
,t.NAME as "Template Name"
,t.TEMPLATE_ID as "Template ID"
,(SELECT created
FROM material
where template_id = t.template_id) as "Date Created"

*,(SELECT DESTINATION_FOLDER_ID,*
CASE DESTINATION_FOLDER_ID
WHEN NULL THEN 'Upload'
ELSE 'HQ'
END
from log_material_copy
where destination_material_id in (select material_id
from material
where template_id = t.template_id ))as "Origin"



,(select material_id
from log_material_copy
where destination_material_id in (select material_id
from material
where template_id = t.template_id)) as "HQ/Upload ID"


,(SELECT COUNT (mse.ID)
FROM MATERIAL_SEND_EVENT mse, material m, creative c
WHERE mse.MATERIAL_ID = m.MATERIAL_ID
AND mse.MATERIAL_TYPE_ID = m.MATERIAL_TYPE_ID
AND m.ASSET_ID = c.id
AND c.TEMPLATE_ID = t.TEMPLATE_ID) as Sent

,(SELECT COUNT (de.ID)
FROM download_event de, material m, creative c
WHERE de.MATERIAL_ID = m.MATERIAL_ID
AND de.MATERIAL_TYPE_ID = m.MATERIAL_TYPE_ID
AND m.ASSET_ID = c.id
AND c.TEMPLATE_ID = t.TEMPLATE_ID) as Download




,(SELECT 'https://main.test.com/bm/servlet/' || 'UArchiveServlet?action=materialInfo&materialId=' || DESTINATION_MATERIAL_ID || '&materialFolderId=' || DESTINATION_FOLDER_ID
from log_material_copy
where destination_material_id in (select material_id
from material
where template_id = t.template_id)) as "URL to template on MPC layer"
--, t.AVAILABLE_FOR_TRANSFER as "Available for transfer"
FROM template t, layout l, groups g
WHERE t.LAYOUT_ID = l.LAYOUT_ID
AND l.ORGANIZATION_ID = g.IP_GROUPID
AND g.IP_GROUPID in ( 1089, 903, 323, 30, 96, 80, 544, 1169, 584, 785, 827, 31, 10, 503, 1025 )
ORDER BY g.GROUP_NAME ASC;


The one in bold is my case statement.. Please let me know what is wrong with this.

Regards,
Jas