I have 4 crore unique code database in various excel files. I want to create multiple small DB basis the first 5 digits of the codes (i.e. 81234 as one DB and 76543 as 2nd DB). I need multiple DBs since I have to run API and running query on such large datebase will take too much of time. I am using PHP and I am unable to upload files even with 10Lakhs code at once.