From clause

Question

The following doesn' work, in the sense that is expecting a FROM clause.
I would like to show all the fields declared after the first SELECT, thus CH_DOC_ID (that could be drop_trigger or ch_doc_id) and title, status and tool.
Here below my code:
SELECT
CASE WHEN PCMS_CHDOC_DATA.TOOL='ICD' THEN
PCMS_CHDOC_DATA.DROP_TRIGGER
ELSE PCMS_CHDOC_DATA.CH_DOC_ID
END CH_DOC_ID,
TITLE,
STATUS,
TOOL
FROM
(SELECT PCMS_CHDOC_DATA.TITLE,
             PCMS_CHDOC_DATA.STATUS,
             PCMS_CHDOC_DATA:TOOL,
             PCMS_CHDOC_DATA.DROP_TRIGGER,
             PCMS_CHDOC_DATA.CH_DOC_ID
FROM
PCMS_CHDOC_DATA
WHERE
--                  PCMS_CHDOC_DATA.STATUS <> 'CLOSED' and
                  PCMS_CHDOC_DATA.TOOL = 'ICD' and
                  lower(PCMS_CHDOC_DATA.TITLE) LIKE  ('auto%pop%') OR
                  lower(PCMS_CHDOC_DATA.TITLE) LIKE ('%wiring%check%')
order by CH_DOC_ID

Answer 1

It gives the error ORA-00904: "PCMS_CHDOC_DATA.CH_DOC_ID : invalid identifier [database vendor code: 0904]ORA-00904: string: invalid identifier
Cause: The column name entered is either missing or invalid.
Please check whether column name is correct/present in the table. Try below code.
{code}
SELECT
CASE WHEN TOOL='ICD' THEN
DROP_TRIGGER
ELSE CH_DOC_ID
END,
CH_DOC_ID,
TITLE,
STATUS,
TOOL
FROM
(SELECT PCMS_CHDOC_DATA.TITLE,
PCMS_CHDOC_DATA.STATUS,
PCMS_CHDOC_DATA.TOOL, --PCMS_CHDOC_DATA:TOOL, -- replace a colon with a dot
PCMS_CHDOC_DATA.DROP_TRIGGER,
PCMS_CHDOC_DATA.CH_DOC_ID
FROM
PCMS_CHDOC_DATA
WHERE
-- PCMS_CHDOC_DATA.STATUS 'CLOSED' and
PCMS_CHDOC_DATA.TOOL = 'ICD' and
lower(PCMS_CHDOC_DATA.TITLE) LIKE ('auto%pop%') OR
lower(PCMS_CHDOC_DATA.TITLE) LIKE ('%wiring%check%')
order by CH_DOC_ID)
{code}
Regards,
Avinash
Edited by: Avinash Tripathi on Nov 16, 2010 8:11 PM