How can we upload the changed value, rather than written in a text file, of column(s) while importing that text file into MySQL table?

Suppose if we want to upload the changed value rather than the value written in a text file then we need to use user variables along with the SET command. It can be understood with the help of the following example −

Example

Suppose we are having the following data in ‘A.txt’ −

105,Chum,USA,11000
106,Danny,AUS,12000

But we want to upload the value of salary after adding 500 to it at the time of importing it without changing the value of salary in a text file then it can be done with the help of the following query by using user variable along with SET option −

mysql> LOAD DATA LOCAL INFILE 'd:\A.txt' INTO table employee11_tbl FIELDS TERMINATED BY ',' (id,name,country,@salary) SET salary = @salary + 500;
Query OK, 2 rows affected (0.21 sec)
Records: 2 Deleted: 0 Skipped: 0 Warnings: 0

mysql> Select * from employee11_tbl;
+------+----------------+----------+--------+
| Id   | Name           | Country  | Salary |
+------+----------------+----------+--------+
| 105  | Chum           | USA      |  11500 |
| 106  | Danny          | AUS      |  12500 |
+------+----------------+----------+--------+
2 rows in set (0.00 sec)

From the above result set, it is clear that MySQL uploaded the data into the table after adding 500 to the value of salary.