root@service:~# mongoexport -d prod -c employees -f _id,platform,phone --csv -o /opt/employees.csv
2018-07-09T09:07:02.691+0000 csv flag is deprecated; please use --type=csv instead
2018-07-09T09:07:02.692+0000 connected to: localhost
2018-07-09T09:07:02.866+0000 exported 11920 records
在EXCEL中导入以逗号分隔的csv文件（数据-->自文本），筛选，删除重复值