Case statement in a multiple query

Question

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

Answer 1

I think you're getting the idea, but:
You're still selecting 2 columns in the (scalar) subquery. Did you read the link I posted for you?
"a) scalar subqueries - *a single row, single column query that you use in place of a "column"*, it looks like a column or function."
You must move that query outside, join to template.
Something like:
NOT TESTED FOR OBVIOUS REASONS SO YOU'LL PROBABLY NEED TO TWEAK IT A BIT
select g.group_name as market,
       t.name as "Template Name",
       t.template_id as "Template ID",
       m.created  as "Date Created",
       lmc.destination_folder_id,
       case lmc.destination_folder_id
         when null then 'Upload'
         else 'HQ'
       end 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 group by
  ,    MATERIAL M
  ,    LOG_MATERIAL_COPY LMC
where t.layout_id = l.layout_id
   and l.organization_id = g.ip_groupid
   and M.TEMPLATE_ID = t.template_id
   and LMC.destination_material_id in ( select material_id
                                        from   material
                                        where  template_id = t.template_id
   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;