Create a table inside database which will be used for rows to import from csv file

SQL> create table student(roll_no number(2), name varchar2(20));

Create a sample csv file at OS level on your database server

# mkdir -p /u02/sql_loader
# cd /u02/sql_loader
# vi load_file.csv

Put some dummy data into the csv file

1,Mukesh
2,Suresh
3,Rajesh

Save the .csv file and close it

Create sql loader control file with .ctl extension

# vi control.ctl

Put below into the control file

LOAD DATA
INFILE 'load_file.csv'
INSERT INTO TABLE student
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
(
roll_no,
name
)

Invoke the sql loader utility at OS level and start import

# sqlldr userid=system/oracle control=control.ctl log=track.log