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  1. or download this
    my $colnum = 21;
my $sql_placeholders = '(?' . ',?' x $colnum . ')';
...
# generate comma-separated column names and values
<...>
$sql_insert_handle->execute($columns,$values);
  2. or download this
    DBD::Pg::st execute failed: called with 2 bind variables when 44 are n
+eeded at C:/Users/user/eclipse-workspace/project1/pgdb.pl line 134.
 at C:/Users/user/eclipse-workspace/project1/pgdb.pl line 134.
    main::ingest_file(undef) called at C:/user/user/eclipse-workspace/
+project1/pgdb.pl line 76