Copy records: is there a simpler sql statement

Question

For each record in one table "msTab" of a MS Sql Server database, I need basically to insert a new record to another one table "oraTab" in Oracle.
I want to do this via codes to meet other requirements. I use Java with jdbc.
It looks like a sql statement (built using codes) must look like:
"Insert into oraTab(field1, field2, field3) values ('XXX', TO_DATE('13-NOV-92','DD-MON-YY', 322)"
If my codes find the date data in msTab being null I thought I need to build insert statement as:
"Insert into oraTab(field1, field3) values ('XXX', 322)", in order that Oracle will insert the default value for field2 automatically (field 2 of oraTab does not allow null).
The logic is not as complicated if there are only 3 fields. But for a table with over a hundred fields, the codes to achieve this is not quite simple. Do I miss some simpler sql statement to do the job?
Thanks.

Answer 1

I believe Satish's suggestion was to use the DEFAULT keyword in the insert
INSERT INTO table_name( col1, col2, col3 )
  VALUES( 1, DEFAULT, 2 );will insert the default value for col2. If you don't know which columns should take on the default value, though, I'm not sure how practical that would be.
Were it me, I'd probably create a BEFORE INSERT trigger that replaced NULL values with appropriate default values and then just do
INSERT INTO oracleTable( column_list )
  SELECT column_list
    FROM sqlTable@databaseLinkJustin