It depends on what you want/need to put in the other 188 columns:
- if they can be NULL you can omit them (they will be set to NULL)
- if they are NOT NULL but have a DEFAULT you can omit them (they will be set to the DEFAULT)
- if they are NOT NULL and do not have a DEFAULT then you must specify a value.
In the last case, there are various options for specifying a value in the control file:
COL2 CONSTANT 'x',
COL3 RECNUM,
COL4 SYSDATE,
COL5 SEQUENCE (1)
...
See the SQL Loader Guide here for more details:
http://technet.oracle.com/docs/produ...06.htm#1008669