How to export large table data into different files in oracle

I tried your script and recreated your environment completely and i didn't see any error.

Ran perfectly and created all tables and transferred all data successfully

i tried running under a sql agent job and still no error was generated

but i guess you can update your insert script by making sure the column gets converted under all conditions

[BO_ID] = CASE WHEN isnumeric([BO_ID]) = 1 THEN [BO_ID] ELSE CAST([BO_ID] as DECIMAL(31,0)) END

or

[BO_ID] = CASE WHEN isnumeric([BO_ID]) = 1 THEN [BO_ID] ELSE Null END

change your script to

INSERT INTO OPENQUERY (
    ZMMS_ORA 
    'SELECT 
        "COMPANYID",
        "BO_ID",
        "AS CM",
        "AS RSM",
        "AS SE",
        "TS CM",
        "TS RAE",
        "TS RSM",
        "TS SE",
        "BBONE AM",
        "ASM",
        "WCT ASM",
        "LS TSM",
        "WCT TSM",
        "TS TSM",
        "AS PM",
        "AS DEV",
        "TS PM",
        "TS DEV",
        "TS TECH",
        "BB EXEC",
        "CHM",
        "ANGEL Client Manager (CM)",
        "ANGEL Engagement Team",
        "BbOne Client Manager (CM)",
        "Blackboard Executive",
        "CE/Vista Hosting Mgr (ASM)",
        "CE/Vista Tech Support (TSM)",
        "Complex Hosting Manager (CHM)",
        "Learn Client Manager (CM)",
        "Learn Hosting Mgr (ASM)",
        "Learn Reg Sales Mgr (RSM)",
        "Learn Sales Engineer (SE)",
        "Learn Services Developer",
        "Learn Services ICM Mgr",
        "Learn Services Project Manager",
        "Learn Tech Support (TSM)",
        "Transact Client Manager (CM)",
        "Transact Project Manager",
        "Transact Reg Acct Exec (RAE)",
        "Transact Reg Sales Mgr (RSM)",
        "Transact Sales Engineer (SE)",
        "Transact Services Technician",
        "Transact Tech Support (TSM)",
        "Xythos Tech Support (TSM)"  FROM ZMMSUSER.PSRPT_TEAM_ROLES_PSFT'
    )
SELECT "COMPANYID"
    ,[BO_ID] = CASE WHEN isnumeric([BO_ID]) = 1 THEN [BO_ID] ELSE CAST([BO_ID] as DECIMAL(31,0)) END 
    ,"AS CM"
    ,"AS RSM"
    ,"AS SE"
    ,"TS CM"
    ,"TS RAE"
    ,"TS RSM"
    ,"TS SE"
    ,"BBONE AM"
    ,"ASM"
    ,"WCT ASM"
    ,"LS TSM"
    ,"WCT TSM"
    ,"TS TSM"
    ,"AS PM"
    ,"AS DEV"
    ,"TS PM"
    ,"TS DEV"
    ,"TS TECH"
    ,"BB EXEC"
    ,"CHM"
    ,"ANGEL Client Manager (CM)"
    ,"ANGEL Engagement Team"
    ,"BbOne Client Manager (CM)"
    ,"Blackboard Executive"
    ,"CE/Vista Hosting Mgr (ASM)"
    ,"CE/Vista Tech Support (TSM)"
    ,"Complex Hosting Manager (CHM)"
    ,"Learn Client Manager (CM)"
    ,"Learn Hosting Mgr (ASM)"
    ,"Learn Reg Sales Mgr (RSM)"
    ,"Learn Sales Engineer (SE)"
    ,"Learn Services Developer"
    ,"Learn Services ICM Mgr"
    ,"Learn Services Project Manager"
    ,"Learn Tech Support (TSM)"
    ,"Transact Client Manager (CM)"
    ,"Transact Project Manager"
    ,"Transact Reg Acct Exec (RAE)"
    ,"Transact Reg Sales Mgr (RSM)"
    ,"Transact Sales Engineer (SE)"
    ,"Transact Services Technician"
    ,"Transact Tech Support (TSM)"
    ,"Xythos Tech Support (TSM)"
FROM CRMRPT..B_RPT_B_TEAM_ROLE;

This is the solution I came up with:

1. Enable xp_cmdshell with

   EXEC sp_configure 'show advanced options', 1
   GO
   RECONFIGURE
   GO
   EXEC sp_configure 'xp_cmdshell', 1
   GO
   RECONFIGURE
   GO
   

2. If needed create a directory with xp_cmdshell to get the needed permissions.

   EXEC master..xp_cmdshell 'mkdir C:\exportdir'
   

3. Use BCP with queryout

   EXEC master..xp_cmdshell 'BCP "SELECT column_of_type_image FROM **your_db WHERE id = 1 " queryout "C:\exportdir\yourfile.pdf" -T -N'
   

**your_db must be the fully qualified table name, i.e [Yourdb].[YourSchema].[YourTable]