UNION bei zwei Auswahl gibt 'SQL-Fehler: ORA-00907: fehlende rechte Klammer'

Question

Ich versuche UNION die Ergebnisse von zwei Abfragen. Aber ich bin immer folgende Fehlermeldung:

Error at Command Line:9 Column:81 
Error report: 
SQL Error: ORA-00907: missing right parenthesis 
00907. 00000 - "missing right parenthesis" 

Hier ist meine Frage:

SELECT application_id, clicks, datee, client_id FROM(
(select 
    APPL_CD AS application_id, 
    count(*) as clicks, 
    to_date((to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy')), 'dd-mm-yyyy') as datee, 
    ALRT_RSPNS_FROM_CLIENT_ID AS client_id 
from ALRT_PLATFORM_ALRT_HSTRY 
    where ACTN_TAKE_CD is not null 
    group by to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy'), APPL_CD, ALRT_RSPNS_FROM_CLIENT_ID order by datee) 
UNION ALL 
(select 
    APPL_CD AS application_id, 
    count(*) as clicks, 
    to_date((to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy')), 'dd-mm-yyyy') as datee, 
    ALRT_RSPNS_FROM_CLIENT_ID AS client_id 
from ALRT_PLATFORM_ALRT 
    where ACTN_TAKE_CD is not null 
    group by to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy'), APPL_CD, ALRT_RSPNS_FROM_CLIENT_ID order by datee) 
) 

Answer 1

die ORDER BY aus den verschachtelten Abfragen entfernen:

SELECT application_id, clicks, datee, client_id FROM(
(select 
    APPL_CD AS application_id, 
    count(*) as clicks, 
    to_date((to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy')), 'dd-mm-yyyy') as datee, 
    ALRT_RSPNS_FROM_CLIENT_ID AS client_id 
from ALRT_PLATFORM_ALRT_HSTRY 
    where ACTN_TAKE_CD is not null 
    group by to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy'), APPL_CD, ALRT_RSPNS_FROM_CLIENT_ID) 
UNION ALL 
(select 
    APPL_CD AS application_id, 
    count(*) as clicks, 
    to_date((to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy')), 'dd-mm-yyyy') as datee, 
    ALRT_RSPNS_FROM_CLIENT_ID AS client_id 
from ALRT_PLATFORM_ALRT 
    where ACTN_TAKE_CD is not null 
    group by to_char(ACTN_TAKE_DATA_TM, 'dd-mm-yyyy'), APPL_CD, ALRT_RSPNS_FROM_CLIENT_ID) 
)