This query is returning an error 'strings not well terminated' Pls help

Question

SELECT CONCAT(CONCAT('HDRLMPeople CORPTRAVEL', "YYYYMMDD"), ' ')
UNION
SELECT CONCAT(CONCAT(CONCAT(CONCAT(CONCAT(CONCAT(CONCAT(CONCAT(CONCAT(substr(CONCAT(V_APPT_BASIC.PERSON_ID, ' '), 1, 11),
SUBSTR(CONCAT(V_APPT_BASIC.FIRST_NAME, ' '), 1, 30)),
SUBSTR(CONCAT(V_APPT_BASIC.LAST_NAME, ' '), 1, 30)), ' INSERTED TEXT') as ExportRow,
SUBSTR(CONCAT(V_BU_BASIC.BU_CODE, ' '), 1, 10),
SUBSTR(CONCAT(V_BU_BASIC.BU_NAME, ' '), 1, 30)),
SUBSTR(CONCAT(V_BU_BASIC.BU_PARENT, ' '), 1,10),
SUBSTR(CONCAT(V_BU_BASIC.BU_PARENT_NAME, ' '), 1, 30)), ' INSERTED TEXT') as ExportRow, ' INSERTED TEXT') as ExportRow, ' INSERTED TEXT') as ExportRow, ' INSERTED TEXT) as ExportRow, ' INSERTED TEXT') as ExportRow, ' INSERTED TEXT) as ExportRow,
SUBSTR(CONCAT(V_EMP_ALL.BIRTHDATE, ' '), 1, 8),
SUBSTR(CONCAT(V_EMP_ALL.GENDER, ' '), 1, 8), 'Y') as ExportRow,
FROM HRREPORT.V_APPT_BASIC V_APPT_BASIC,
HRREPORT.V_BU_BASIC V_BU_BASIC,
HRREPORT.V_BU_HIERARCHY V_BU_HIERARCHY,
REPORTS.V_EMP_ALL V_EMP_ALL
WHERE V_APPT_BASIC.CO_C = V_EMP_ALL.COMPANYCODE AND V_APPT_BASIC.EMP_FILE_NB = V_EMP_ALL."FILE#" AND V_APPT_BASIC.BU_CODE = V_BU_HIERARCHY.BU_CODE AND V_BU_HIERARCHY.BU_PARENT_CODE = V_BU_BASIC.BU_CODE AND ((V_EMP_ALL.STATUS='TEXT',)) = ((V_BU_BASIC.UNIT='TEXT',)) AND ((V_BU_BASIC.UNIT_DESCRIPTION='TEXT')) = ((V_BU_BASIC.SETID='TEXT')) AND ((V_BU_BASIC.SETID_DESCRIPTION='TEXT')) = ((V_BU_BASIC.AREA='A7500')) AND ((V_BU_BASIC.AREA_DESCRIPTION='TEXT')) = ((V_EMP_ALL.FIELD='Y'))
UNION
SELECT CONCAT(CONCAT('TRL', COUNT(*)), '

Answer 1

SELECT CONCAT(CONCAT('HDRLMPeople CORPTRAVEL', "YYYYMMDD"), ' ') will do absolutely nothing. You can not select from the vacuum.
Perhaps you meant to SELECT ... FROM dual;
It works better that way. ;)
It also helps to use single-quotes rather than double quotes.
SELECT CONCAT(CONCAT('HDRLMPeople CORPTRAVEL', 'YYYYMMDD'), ' ') from dual;Though what it is you are actually trying to accomplish escapes me. What is the point of this construct?