* measurement is used as the table name. Comma delimiter is used to separate measurement and tag_set.
* tag_set represent tag data in key-value pairs. The format is: `<tag_key>=<tag_value>,<tag_key>=<tag_value>`. Comma delimiter is used to separate multiple tag key-value pairs. Space delimiter is used to separate tag_set and field_set.
* field_set represent column data in key-value pairs. The format is similar to tag_set: `<field_key>=<field_value>,<field_key>=<field_value>`. Comma delimiter is used to separate multiple tag key-value pairs。Space delimiter is used to separate field_set and timestamp.
* field_set represent column data in key-value pairs. The format is similar to tag_set: `<field_key>=<field_value>,<field_key>=<field_value>`. Comma delimiter is used to separate multiple tag key-value pairs. Space delimiter is used to separate field_set and timestamp.
* Timestamp is the primary key of one data row.
All tag values in tag_set are automatically converted and stored as NCHAR data type in TDengine and no need to be surrounded by double quote("）
