我正在尝试UNION两个查询的结果.但是我收到以下错误：
Error at Command Line:9 Column:81 Error report: sql Error: ORA-00907: missing right parenthesis 00907. 00000 - "missing right parenthesis"
这是我的查询：
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,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,ALRT_RSPNS_FROM_CLIENT_ID order by datee )
)
