1. Generally speaking, if you don't store Chinese characters, you don't need to arrange character encoding.

2, pure digital data, there is no need to sort it out, even if it is sorted out, the last time it was saved, the observation and sorting was empty.

3. Generally, the 3.id needs to be set to "non-negative" and "auto-increasing" and set to the primary key (not all, but in most cases).

4. The character encoding must be consistent with your webpage encoding and webpage file encoding. That is to say, if your webpage file output character set is set to gbk, then your webpage file storage must also be saved as gbk, and the database coding must also be gbk.

5. It is recommended to set it to utf8.