*, first of all, you need to know where your source data comes from
What database or excel or other file format
* Second, you need to know where you want to transfer the data
what kind of database
*, Since it is data transfer, it must involve data cleaning and comparison
Clean up the one-character precision of fields that must be refined to the target
*, On the basis of the previous step, you must refine to specific fields and their field types
eg: 1. The field structure of the source data and the target table must be consistent, that is, all of them must be date types
The format of the date field is generally yyyy-[.]MM-[.]dd, and yyyy, yyyy-[.]MM cannot appear
2. Fields of the main numeric type