As per sqoop user guide, it imports data in parallel form. You can specify the number of mappers by --num-mappers or -m, by the default value of this arg is four. So in your case, you can use it like
sqoop import --connect <<>> --username <<>> --password <<>> --query 'Select * from orders WHERE $CONDITIONS' --num-mappers 2 --target-dir 'marwaadihu_orders/'
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Thanks & Regards,