SQL*Loader - How to load only a few columns from a .csv file to ora table

Hi there,
Could anyone please let me know how to load few columns from a .csv
file into a oracle table using SQL*Loader.
I know how to create a .dat and .ctl file and run the sql loader.
Suppose I have a .csv file with
col1, col2, col3, col4
and I only need to load col1 and col3 into col_a and col_b respectively
in table_a?
structure of table_ a
col_a,
col_b
Please advice

Try like..it i will work..
LOAD DATA
INFILE 'test.txt'
LOAD DATA
TRUNCATE INTO TABLE T1
FIELDS TERMINATED BY ','
(col1,
col2 FILLER,
col3,
col4 FILLER
)

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SQL*Loader - How to load only a few columns from a .csv file to ora table

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