Compare large csv files #eg38

Here are two csv files (A and B) of same structure. Both use KEY_A, KEY_B and KEY_C as the primary key, and the two have different records.

1. Find difference of A and B, that is, records existing in A but not existing in B, according to the primary key. Below is the expected result:

Write SPL code to do the three comparisons. Below is for the 1st comparison:

to find how to integrate SPL into a Java application.

This is one of the problems on