Writing a stored procedure to import SQL Server table data into a Oracle table

Question

Hello,
As a new DBA I have been tasked with writing a stored procedure to import SQL Server table data into an Oracle table. I have been given many suggestions on how to do it from SQL Server but I I just need to write a stored procedure to run it from the Oracle side. Suggestions/guidance on where to start would be greatly appreciated! Thank you!
I started to write it based on what I have but I know this is not correct :/
# Here is the select statement for the data source in SQL Server...
SELECT COMPANY
,CUSTOMER
,TRANS_TYPE
,INVOICE
,TRANS_DATE
,STATUS
,TRAN_AMT
,CREDIT_AMT
,APPLD_AMT
,ADJ_AMT
,TRANS_USER1
,PROCESS_LEVEL
,DESCRIPTION
,DUE_DATE
,OUR_DATE
,OUR_TIME
,PROCESS_FLAG
,ERROR_DESCRIPTION
  FROM data_source_table_name
#It loads data into the table in Oracle....   
Insert into oracle_destination_table_name (
COMPANY,
CUSTOMER,
TRANS_TYPE,
INVOICE,
TRANS_DATE,
STATUS,
TRANS_AMT,
CREDIT_AMT,
APPLD_AMT,
ADJ_AMT,
TRANS_USER1,
PROCESS_LEVEL,
DESCRIPTION,
DUE_DATE,
OUR_DATE,
OUR_TIME,
PROCESS_FLAG,
ERROR_DESCRIPTION)
END;

Answer 1

CREATE TABLE statements would have been better as MS-SQL and Oracle don't have the same data types.
OUR_DATE, OUR_TIME will (most likely) be ONE column in Oracle.
DATABASE LINK
Personally, I'd just load the data over a database link:
insert into oracle_destination_table_name ( <column list> )
select ... <transform data here>
from data_source_table@mssql_db_link
As far as creating the database link from Oracle to MS-SQL ... that is for somebody else to answer.
(most likely you'll need to use an ODBC driver)
EXTERNAL TABLE
If the data from MS-SQL is in a CSV file, just use and external table.
same concept:
insert into oracle_destination_table_name ( <column list> )
select ... <transform data here>
from data_source_external_table
MK