http://mng.seedcollector.net/blog/?p=582

https://www.cnblogs.com/oumi/p/7918665.html

1. Can be up to 10 characters long or less.
2. Should only contain characters a–z, 0–9, and underscores.
3. Do not use spaces, hyphens, parentheses, brackets, and other special characters, such as $, %, and #.
4. Avoid using field names that contain words that are typically considered reserved keywords. These are typically data, day, month, (table), text, user, when, (where), year, and zone.