Oracle Case statement problem

Im relatively new to Oracle query syntax so can you help me out with the Case statement.

Select SECTION_ID, SECTION_TYPE, SECTION_ORDINAL, SECTION_TABLE_CELL,
CASE SECTION_TYPE
WHEN LINKLIST
THEN (SELECT LINK_LIST_NAME FROM OMNI_ENT_LINKLIST WHERE LINKLIST_ID = SECTION_ID)
WHEN LINE
THEN (SELECT LINK_ID FROM OMNI_ENT_LINK WHERE LINK_ID = SECTION_ID)
WHEN HEADER
THEN (SELECT LINK_ID FROM OMNI_ENT_HEADER WHERE HEADER_ID = SECTION_ID)
WHEN PARAGRAPH
THEN (SELECT LINK_ID FROM OMNI_ENT_PARAGRAPH WHERE LINK_ID = SECTION_ID)
ELSE ''
END AS SECTION_ENTITY
FROM OMNI_ENT_PAGE_CONTENT

Oracle DatabaseSQL

Last Comment

jknj72

8/22/2022 - Mon

ASKER CERTIFIED SOLUTION

Steve Wales

12/27/2012

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Qlemo

12/27/2012

I would prefer to not use a case here:

Select SECTION_ID, SECTION_TYPE, SECTION_ORDINAL, SECTION_TABLE_CELL,
   types.ID AS SECTION_ENTITY
FROM OMNI_ENT_PAGE_CONTENT
Left Join  (
  select 'LINKLIST' as Type, Link_List_Name as ID from Omni_Ent_Linklist
  union
  select 'LINE', Link_ID from Omni_Ent_Link
  union
  select 'HEADER', Link_ID from Omni_Ent_Header
  union
  select 'PARAGRAPH', Link_ID from Omni_Ent_Paragraph ) types
on types.type = Section_Type

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jknj72

12/27/2012

ASKER

yes that worked, glad I wasnt far off....Thanks

jknj72

12/27/2012

ASKER

thanks

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