Parenthesis error when I add one more UNION [duplicate] - sql

Question

This question already has answers here:
Oracle: Order by Union returning ORA-00933: SQL command not properly ended
(3 answers)
Closed 4 months ago.
I have a subquery of another query in which I have to show a lot of data, and I wanted to add a third UNION in the query. It should be noted that before adding the third UNION the query worked without problems, but when adding the third UNION it shows me an error of
ORA-00907: missing right parenthesis
00907. 00000 - "missing right parenthesis"
The line it indicates is a parenthesis just before the third UNION, but if I add it, everything falls apart and gives an error that the query is not closing properly and thus a loop. Searching I have seen that it may be because of the order by that does not support them when there are multiple unions, but with two it already works, I do not understand it.
This is the entire subquery:
SELECT
*
FROM
(
SELECT
ROWNUM RNUM,
SUBQUERY.*
FROM
(
SELECT
SERVICES_TABLE.SERVICE_ID SESSION_SERVICE_CATALOG_ID,
MT_CES_SERVICE_LEVEL_3.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_3_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_3.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_3_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_2.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_2_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_2.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_2_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_2.ID MT_CES_SERVICE_LEVEL_2_ID,
MT_CES_SERVICE_LEVEL_1.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_1_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_1.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_1_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_1.ID MT_CES_SERVICE_LEVEL_1_ID,
MT_CES_SERVICE_LEVEL_3.ALARM_DAYS CES_CATALOG_ALARM_DAYS,
MT_CES_SERVICE_LEVEL_3.ADVANCE_DAYS CES_CATALOG_ADVANCE_DAYS,
MT_CES_SERVICE_LEVEL_3.COST_BY_STUDENT CES_CATALOG_COST_BY_STUDENT,
MT_CES_SERVICE_LEVEL_3.DESCRIPTION,
SERVICES_TABLE.COST SESSION_SERVICE_COST,
SERVICES_TABLE.NUM_ITEMS SESSION_SERVICE_NUM_ITEMS,
SERVICES_TABLE.COMMENTS SESSION_SERVICE_COMMENTS,
SERVICES_TABLE.STATUS PROGRAM_SERVICE_STATUS,
MT_CES_STATUS.TEXT_NAME_EN PROGRAM_SERVICE_STATUS_LITERAL,
(
SELECT
LISTAGG(MTP.TEXT_NAME_EN, ', ') WITHIN GROUP(
ORDER BY
MTP.TEXT_NAME_EN ASC
)
FROM
FRM.MT_CES_SERVICE_LEVEL_3_PROVIDERS P
INNER JOIN FRM.MT_CES_PROVIDER MTP
ON
(MTP.ID = P.PROVIDER_ID)
WHERE
P.MT_CES_SERVICE_LEVEL_3_ID = MT_CES_SERVICE_LEVEL_3.ID
) PROVIDER_LITERAL,
(
SELECT
LISTAGG(PRO.NAME, ', ') WITHIN GROUP(
ORDER BY
PRO.NAME ASC
)
FROM
FRM.SESIONCURSO SES
INNER JOIN FRM.AS_COURSE COU
ON
(
SES.CURSO = COU.ID AND COU.REMOVED = '0'
)
INNER JOIN FRM.AS_PERIOD PE
ON
(
COU.PERIOD_ID = PE.ID AND PE.REMOVED = '0'
)
INNER JOIN FRM.AS_PROGRAM PRO
ON
(
PE.PROGRAM_ID = PRO.ID AND PRO.REMOVED = '0'
)
WHERE
PRO.ID != AS_PROGRAM.ID AND SES.HORAINICIO = SE.HORAINICIO AND(
NVL(
SE.AULA,
(
NVL(
AS_COURSE.CLASSROOM_ID,
AS_PROGRAM.CLASSROOM_ID
)
)
)
) =(
NVL(
SES.AULA,
(
NVL(
COU.CLASSROOM_ID,
PRO.CLASSROOM_ID
)
)
)
)
) PROGRAMS_NAME,
AS_PROGRAM.PARTICIPANTS PROGRAM_PARTICIPANTS,
SE.HORAINICIO SESSION_DATE,
SE.ID SESSION_ID,
'0' IS_SPECIAL_SESSION,
SE.NOMBRE SESSION_TITLE,
SERVICES_TABLE.ID SERVICE_ID,
SERVICES_TABLE.PARTICIPANTS,
SERVICES_TABLE.CLASSROOM_ID SERVICE_CLASSROOM_ID,
SERVICES_TABLE.SERVICE_START,
SERVICES_TABLE.SERVICE_END,
(
SELECT
AUL.TEXT_CODE
FROM
FRM.MT_CLASSROOM AUL
WHERE
AUL.ID = NVL(
SE.AULA,
(
NVL(
AS_COURSE.CLASSROOM_ID,
AS_PROGRAM.CLASSROOM_ID
)
)
)
) CALCULATED_CLASSROOM,
(
SELECT
LISTAGG(MTP.TEXT_CODE, ', ') WITHIN GROUP(
ORDER BY
MTP.TEXT_CODE ASC
)
FROM
FRM.CES_SESSION_SERVICES_CLASSROOMS P
INNER JOIN FRM.MT_CLASSROOM MTP
ON
(MTP.ID = P.CLASSROOM_ID)
WHERE
P.SERVICE_ID = SERVICES_TABLE.ID
) SERVICE_CLASSROOMS,
SE.HORAINICIO +(1 / 1440 * SE.MINUTOS) SESSION_END_DATE,
AS_PROGRAM.STATUS_ID PROGRAM_STATUS_ID,
AS_PROGRAM.NAME PROGRAM_NAME,
MT_CES_SERVICE_LEVEL_3.EXT_LINK_NAME,
MT_CES_SERVICE_LEVEL_3.EXT_LINK_URI,
CASE WHEN EXISTS(
SELECT
CES_MATERIALCOORD.ID
FROM
FRM.CES_MATERIALCOORD
WHERE
CES_MATERIALCOORD.SESSIONSERVICE_ID = SERVICES_TABLE.ID
) THEN '1' ELSE '0'
END AS HASMATERIAL,
SERVICES_TABLE.PENDING_SEND
FROM
FRM.SESIONCURSO SE
INNER JOIN FRM.AS_COURSE ON
(
SE.CURSO = AS_COURSE.ID AND AS_COURSE.REMOVED = '0'
)
INNER JOIN FRM.AS_PERIOD ON
(
AS_COURSE.PERIOD_ID = AS_PERIOD.ID AND AS_PERIOD.REMOVED = '0'
)
INNER JOIN FRM.AS_PROGRAM ON
(
AS_PERIOD.PROGRAM_ID = AS_PROGRAM.ID AND AS_PROGRAM.REMOVED = '0'
)
INNER JOIN FRM.CES_SESSION_SERVICES SERVICES_TABLE
ON
(
SERVICES_TABLE.SESSION_ID = SE.ID
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_3 ON
(
MT_CES_SERVICE_LEVEL_3.ID = SERVICES_TABLE.SERVICE_ID
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_2 ON
(
MT_CES_SERVICE_LEVEL_2.ID = MT_CES_SERVICE_LEVEL_3.PARENT_SERVICE
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_1 ON
(
MT_CES_SERVICE_LEVEL_1.ID = MT_CES_SERVICE_LEVEL_2.PARENT_SERVICE
)
INNER JOIN FRM.MT_CES_STATUS ON
(
MT_CES_STATUS.ID = SERVICES_TABLE.STATUS
)
LEFT JOIN FRM.MT_CES_PROVIDER ON
(
MT_CES_PROVIDER.ID = MT_CES_SERVICE_LEVEL_3.PROVIDER_ID
)
WHERE
AS_PROGRAM.ID = 'TEST'
UNION ALL
SELECT
SERVICES_TABLE.SERVICE_ID SESSION_SERVICE_CATALOG_ID,
MT_CES_SERVICE_LEVEL_3.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_3_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_3.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_3_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_2.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_2_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_2.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_2_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_2.ID MT_CES_SERVICE_LEVEL_2_ID,
MT_CES_SERVICE_LEVEL_1.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_1_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_1.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_1_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_1.ID MT_CES_SERVICE_LEVEL_1_ID,
MT_CES_SERVICE_LEVEL_3.ALARM_DAYS CES_CATALOG_ALARM_DAYS,
MT_CES_SERVICE_LEVEL_3.ADVANCE_DAYS CES_CATALOG_ADVANCE_DAYS,
MT_CES_SERVICE_LEVEL_3.COST_BY_STUDENT CES_CATALOG_COST_BY_STUDENT,
MT_CES_SERVICE_LEVEL_3.DESCRIPTION,
SERVICES_TABLE.COST SESSION_SERVICE_COST,
SERVICES_TABLE.NUM_ITEMS SESSION_SERVICE_NUM_ITEMS,
SERVICES_TABLE.COMMENTS SESSION_SERVICE_COMMENTS,
SERVICES_TABLE.STATUS PROGRAM_SERVICE_STATUS,
MT_CES_STATUS.TEXT_NAME_EN PROGRAM_SERVICE_STATUS_LITERAL,
(
SELECT
LISTAGG(MTP.TEXT_NAME_EN, ', ') WITHIN GROUP(
ORDER BY
MTP.TEXT_NAME_EN ASC
)
FROM
FRM.MT_CES_SERVICE_LEVEL_3_PROVIDERS P
INNER JOIN FRM.MT_CES_PROVIDER MTP
ON
(MTP.ID = P.PROVIDER_ID)
WHERE
P.MT_CES_SERVICE_LEVEL_3_ID = MT_CES_SERVICE_LEVEL_3.ID
) PROVIDER_LITERAL,
(
SELECT
LISTAGG(PRO.NAME, ', ') WITHIN GROUP(
ORDER BY
PRO.NAME ASC
)
FROM
FRM.SESIONESPECIAL SES
INNER JOIN FRM.AS_PROGRAM PRO
ON
(
SES.IDPROGRAMA = PRO.ID AND PRO.REMOVED = '0'
)
WHERE
PRO.ID != AS_PROGRAM.ID AND SES.HORAINICIO = SE.HORAINICIO AND(
NVL(
SE.AULA,
(AS_PROGRAM.CLASSROOM_ID)
)
) = NVL(SES.AULA, PRO.CLASSROOM_ID)
) PROGRAMS_NAME,
AS_PROGRAM.PARTICIPANTS PROGRAM_PARTICIPANTS,
SE.HORAINICIO SESSION_DATE,
SE.ID SESSION_ID,
'1' IS_SPECIAL_SESSION,
SE.NOMBRE SESSION_TITLE,
SERVICES_TABLE.ID SERVICE_ID,
SERVICES_TABLE.PARTICIPANTS,
SERVICES_TABLE.CLASSROOM_ID SERVICE_CLASSROOM_ID,
SERVICES_TABLE.SERVICE_START,
SERVICES_TABLE.SERVICE_END,
(
SELECT
AUL.TEXT_CODE
FROM
FRM.MT_CLASSROOM AUL
WHERE
AUL.ID = NVL(
SE.AULA,
AS_PROGRAM.CLASSROOM_ID
)
) CALCULATED_CLASSROOM,
(
SELECT
LISTAGG(MTP.TEXT_CODE, ', ') WITHIN GROUP(
ORDER BY
MTP.TEXT_CODE ASC
)
FROM
FRM.CES_SPECIAL_SESSION_SERVICES_CLASSROOMS P
INNER JOIN FRM.MT_CLASSROOM MTP
ON
(MTP.ID = P.CLASSROOM_ID)
WHERE
P.SERVICE_ID = SERVICES_TABLE.ID
) SERVICE_CLASSROOMS,
SE.HORAINICIO +(1 / 1440 * SE.MINUTOS) SESSION_END_DATE,
AS_PROGRAM.STATUS_ID PROGRAM_STATUS_ID,
AS_PROGRAM.NAME PROGRAM_NAME,
MT_CES_SERVICE_LEVEL_3.EXT_LINK_NAME,
MT_CES_SERVICE_LEVEL_3.EXT_LINK_URI,
CASE WHEN EXISTS(
SELECT
CES_MATERIALCOORD.ID
FROM
FRM.CES_MATERIALCOORD
WHERE
CES_MATERIALCOORD.SPECIALSESSIONSERVICE_ID = SERVICES_TABLE.ID
) THEN '1' ELSE '0'
END AS HASMATERIAL,
SERVICES_TABLE.PENDING_SEND
FROM
FRM.SESIONESPECIAL SE
INNER JOIN FRM.AS_PROGRAM ON
(
SE.IDPROGRAMA = AS_PROGRAM.ID AND AS_PROGRAM.REMOVED = '0'
)
INNER JOIN FRM.CES_SPECIAL_SESSION_SERVICES SERVICES_TABLE
ON
(
SERVICES_TABLE.SESSION_ID = SE.ID
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_3 ON
(
MT_CES_SERVICE_LEVEL_3.ID = SERVICES_TABLE.SERVICE_ID
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_2 ON
(
MT_CES_SERVICE_LEVEL_2.ID = MT_CES_SERVICE_LEVEL_3.PARENT_SERVICE
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_1 ON
(
MT_CES_SERVICE_LEVEL_1.ID = MT_CES_SERVICE_LEVEL_2.PARENT_SERVICE
)
INNER JOIN FRM.MT_CES_STATUS ON
(
MT_CES_STATUS.ID = SERVICES_TABLE.STATUS
)
LEFT JOIN FRM.MT_CES_PROVIDER ON
(
MT_CES_PROVIDER.ID = MT_CES_SERVICE_LEVEL_3.PROVIDER_ID
)
WHERE
AS_PROGRAM.ID = 'TEST'
ORDER BY
SERVICE_START
DESC
,
SESSION_DATE
DESC
,
MT_CES_SERVICE_LEVEL_1_TEXT_NAME_EN
DESC
UNION ALL
SELECT
SERVICES_TABLE.SERVICE_ID SESSION_SERVICE_CATALOG_ID,
MT_CES_SERVICE_LEVEL_3.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_3_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_3.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_3_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_2.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_2_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_2.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_2_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_2.ID MT_CES_SERVICE_LEVEL_2_ID,
MT_CES_SERVICE_LEVEL_1.TEXT_NAME_ES MT_CES_SERVICE_LEVEL_1_TEXT_NAME_ES,
MT_CES_SERVICE_LEVEL_1.TEXT_NAME_EN MT_CES_SERVICE_LEVEL_1_TEXT_NAME_EN,
MT_CES_SERVICE_LEVEL_1.ID MT_CES_SERVICE_LEVEL_1_ID,
MT_CES_SERVICE_LEVEL_3.ALARM_DAYS CES_CATALOG_ALARM_DAYS,
MT_CES_SERVICE_LEVEL_3.ADVANCE_DAYS CES_CATALOG_ADVANCE_DAYS,
MT_CES_SERVICE_LEVEL_3.COST_BY_STUDENT CES_CATALOG_COST_BY_STUDENT,
MT_CES_SERVICE_LEVEL_3.DESCRIPTION,
SERVICES_TABLE.COST SESSION_SERVICE_COST,
SERVICES_TABLE.NUM_ITEMS SESSION_SERVICE_NUM_ITEMS,
SERVICES_TABLE.COMMENTS SESSION_SERVICE_COMMENTS,
SERVICES_TABLE.STATUS PROGRAM_SERVICE_STATUS,
MT_CES_STATUS.TEXT_NAME_EN PROGRAM_SERVICE_STATUS_LITERAL,
(
SELECT
LISTAGG(MTP.TEXT_NAME_EN, ', ') WITHIN GROUP(
ORDER BY
MTP.TEXT_NAME_EN ASC
)
FROM
FRM.MT_CES_SERVICE_LEVEL_3_PROVIDERS P
INNER JOIN FRM.MT_CES_PROVIDER MTP
ON
(MTP.ID = P.PROVIDER_ID)
WHERE
P.MT_CES_SERVICE_LEVEL_3_ID = MT_CES_SERVICE_LEVEL_3.ID
) PROVIDER_LITERAL,
(
SELECT
LISTAGG(PRO.NAME, ', ') WITHIN GROUP(
ORDER BY
PRO.NAME ASC
)
FROM
FRM.SESIONCURSO SES
INNER JOIN FRM.AS_COURSE COU
ON
(
SES.CURSO = COU.ID AND COU.REMOVED = '0'
)
INNER JOIN FRM.AS_PERIOD PE
ON
(
COU.PERIOD_ID = PE.ID AND PE.REMOVED = '0'
)
INNER JOIN FRM.AS_PROGRAM PRO
ON
(
PE.PROGRAM_ID = PRO.ID AND PRO.REMOVED = '0'
)
WHERE
PRO.ID != AS_PROGRAM.ID AND SES.HORAINICIO = SE.HORAINICIO AND(
NVL(
SE.AULA,
(
NVL(
AS_COURSE.CLASSROOM_ID,
AS_PROGRAM.CLASSROOM_ID
)
)
)
) =(
NVL(
SES.AULA,
(
NVL(
COU.CLASSROOM_ID,
PRO.CLASSROOM_ID
)
)
)
)
) PROGRAMS_NAME,
AS_PROGRAM.PARTICIPANTS PROGRAM_PARTICIPANTS,
SE.HORAINICIO SESSION_DATE,
SE.ID SESSION_ID,
'0' IS_SPECIAL_SESSION,
SE.NOMBRE SESSION_TITLE,
SERVICES_TABLE.ID SERVICE_ID,
SERVICES_TABLE.PARTICIPANTS,
SERVICES_TABLE.CLASSROOM_ID SERVICE_CLASSROOM_ID,
SERVICES_TABLE.SERVICE_START,
SERVICES_TABLE.SERVICE_END,
(
SELECT
AUL.TEXT_CODE
FROM
FRM.MT_CLASSROOM AUL
WHERE
AUL.ID = NVL(
SE.AULA,
(
NVL(
AS_COURSE.CLASSROOM_ID,
AS_PROGRAM.CLASSROOM_ID
)
)
)
) CALCULATED_CLASSROOM,
(
SELECT
LISTAGG(MTP.TEXT_CODE, ', ') WITHIN GROUP(
ORDER BY
MTP.TEXT_CODE ASC
)
FROM
FRM.CES_SESSION_SERVICES_CLASSROOMS P
INNER JOIN FRM.MT_CLASSROOM MTP
ON
(MTP.ID = P.CLASSROOM_ID)
WHERE
P.SERVICE_ID = SERVICES_TABLE.ID
) SERVICE_CLASSROOMS,
SE.HORAINICIO +(1 / 1440 * SE.MINUTOS) SESSION_END_DATE,
AS_PROGRAM.STATUS_ID PROGRAM_STATUS_ID,
AS_PROGRAM.NAME PROGRAM_NAME,
MT_CES_SERVICE_LEVEL_3.EXT_LINK_NAME,
MT_CES_SERVICE_LEVEL_3.EXT_LINK_URI,
CASE WHEN EXISTS(
SELECT
CES_MATERIALCOORD.ID
FROM
FRM.CES_MATERIALCOORD
WHERE
CES_MATERIALCOORD.SESSIONSERVICE_ID = SERVICES_TABLE.ID
) THEN '1' ELSE '0'
END AS HASMATERIAL,
SERVICES_TABLE.PENDING_SEND
FROM
FRM.SESIONCURSO SE
INNER JOIN FRM.AS_COURSE ON
(
SE.CURSO = AS_COURSE.ID AND AS_COURSE.REMOVED = '0'
)
INNER JOIN FRM.AS_PERIOD ON
(
AS_COURSE.PERIOD_ID = AS_PERIOD.ID AND AS_PERIOD.REMOVED = '0'
)
INNER JOIN FRM.AS_PROGRAM ON
(
AS_PERIOD.PROGRAM_ID = AS_PROGRAM.ID AND AS_PROGRAM.REMOVED = '0'
)
INNER JOIN FRM.CES_SESSION_SERVICES SERVICES_TABLE
ON
(
SERVICES_TABLE.SESSION_ID = SE.ID
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_3 ON
(
MT_CES_SERVICE_LEVEL_3.ID = SERVICES_TABLE.SERVICE_ID
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_2 ON
(
MT_CES_SERVICE_LEVEL_2.ID = MT_CES_SERVICE_LEVEL_3.PARENT_SERVICE
)
INNER JOIN FRM.MT_CES_SERVICE_LEVEL_1 ON
(
MT_CES_SERVICE_LEVEL_1.ID = MT_CES_SERVICE_LEVEL_2.PARENT_SERVICE
)
INNER JOIN FRM.MT_CES_STATUS ON
(
MT_CES_STATUS.ID = SERVICES_TABLE.STATUS
)
LEFT JOIN FRM.MT_CES_PROVIDER ON
(
MT_CES_PROVIDER.ID = MT_CES_SERVICE_LEVEL_3.PROVIDER_ID
)
WHERE
SE.ID IN(
SELECT
SES.ID
FROM
FRM.SESIONCURSO SES
INNER JOIN FRM.AS_COURSE COU
ON
(
SES.CURSO = COU.ID AND COU.REMOVED = '0'
)
INNER JOIN FRM.AS_PERIOD PE
ON
(
COU.PERIOD_ID = PE.ID AND PE.REMOVED = '0'
)
INNER JOIN FRM.AS_PROGRAM PRO
ON
(
PE.PROGRAM_ID = PRO.ID AND PRO.REMOVED = '0'
)
WHERE
SES.HORAINICIO =(
SELECT
SES2.HORAINICIO
FROM
FRM.SESIONCURSO SES2
WHERE
SES2.ID = 'TEST'
) AND(
NVL(
SES.AULA,
(
NVL(
COU.CLASSROOM_ID,
PRO.CLASSROOM_ID
)
)
) =(
SELECT
NVL(
SES2.AULA,
(
NVL(
COU2.CLASSROOM_ID,
PRO2.CLASSROOM_ID
)
)
)
FROM
FRM.SESIONCURSO SES2
INNER JOIN FRM.AS_COURSE COU2
ON
(
SES2.CURSO = COU2.ID AND COU2.REMOVED = '0'
)
INNER JOIN FRM.AS_PERIOD PE2
ON
(
COU2.PERIOD_ID = PE2.ID AND PE2.REMOVED = '0'
)
INNER JOIN FRM.AS_PROGRAM PRO2
ON
(
PE2.PROGRAM_ID = PRO2.ID AND PRO2.REMOVED = '0'
)
WHERE
SES2.ID = 'TEST'
)
)
)
) SUBQUERY
WHERE
ROWNUM <= 1000
)
WHERE
RNUM > 0;

Answer 1

It is about the ORDER BY clause; you can't sort each select statement separately, but the whole result set.
No:
select * from
(select first_query
from some_table
order by whatever --> this can't be here
UNION ALL
select second_query
from another_table
)
where some_condition;
Yes #1:
select * from
(select first_query
from some_table
UNION ALL
select second_query
from another_table
)
where some_condition
order by whatever; --> should be here
Yes #2:
select * from
(select first_query
from some_table
UNION ALL
select second_query
from another_table
order by whatever --> should be here
)
where some_condition