Tell sqlldr control file to load missing values as NULL - csv

Question

I have a CSV file. How can I tell the sqlldr control file to load missing values as NULL. (ie the table schema allows NULL for certain column)
Example of CSV
1,Name1
2,Name2
3,
4,Name3
Could you help me to edit my control file here so that a line 3 , the missing value is inserted as NULL in my table
Table
Create table test
( id Number(2), name Varchar(10), primary key (id) );
Control file
LOAD DATA INFILE '{path}\CSVfile.txt'
INSERT INTO test
FIELDS TERMINATED BY ','
(id CHAR,
name CHAR
)

Answer 1

I believe all you should have to do is this:
name CHAR(10) NULLIF(name=BLANKS)

Answer 2

You would have to hint to SQL*Loader that there might be nulls in your data.
2 ways to give that hint to SQL*Loader.
Use TRAILING NULLCOLS option.
LOAD DATA INFILE '{path}\CSVfile.txt'
INSERT INTO test<br>
FIELDS TERMINATED BY ','
TRAILING NULLCOLS
(id CHAR,
name CHAR
)
Recreate your CSV files with enclosed fields and then use OPTIONALLY ENCLOSED BY '"' which lets SQL*Loader clearly see the nulls in your data (nothing between quotes) that looks like "abcd",""
LOAD DATA INFILE '{path}\CSVfile.txt'
INSERT INTO test<br>
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
(id CHAR,
name CHAR
)

Answer 3

I found that using TRAILING NULLCOLS will do the job BUT it has to be for "blanks" at the end of the record line.
LOAD DATA INFILE {path}\Your_File
INSERT INTO TABLE Your_Table
TRAILING NULLCOLS
FIELDS TERMINATED BY ","
(
... your fields
)