With PostgreSQL, you'd use a one-liner:

input file:

$ cat sharan.txt 
apple <= banana;
cat := dog;
elephant <= flag;
[download]

import:

$ perl -ne '
 chomp;
 chop;
 my@arr=split();
 print $arr[0], "\t", $arr[2], "\n";' sharan.txt \
 | psql -d test -c "
  /* drop table if exists sharan_txt; */
  create table sharan_txt(col1 text, col2 text);
  copy sharan_txt from stdin csv delimiter E'\t';
 "
[download]

check:

$ psql -d test -c "select * from sharan_txt"
   col1   |  col2  
----------+--------
 apple    | banana
 cat      | dog
 elephant | flag
(3 rows)
[download]

hth