Impact of having different number of rows in files after import


Got one query on sqoop import.
In sqoop if there is no primary key then we need to use split-by.
What is the impact of having differnet number of rows in files generated by this import? let’s assume that sqoop has created 4 files and each file has number of records as 43000, 20000, 700, 90000
Trying to understand how and where it will impact further?