I always import data via navicat and there's no problem at all. But, I want to build a custom module in drupal, so authorized uses could import data from theirs excel's files to a table.
There's one excel file that contain headers and data like this:
Name Class Grade
Abe 2 A Aaron 1 C Celeste 2 B
I want to put that data to a table called "grade_stat". How should i do it in custom modules? TIA.