E-commerce data statistics are usually completed by the following main roles:

1. E-commerce platforms: E-commerce platforms (such as Alibaba, JD.com, Amazon, etc.) are one of the main sources of data statistics. They record and analyze users' transactions, sales data, user behavior and other information through their own systems and databases.

2. Third-party data service providers: Some companies specialize in providing e-commerce data statistics and analysis services. They collect various data in the e-commerce industry by cooperating with multiple e-commerce platforms or by crawling public data, and organize, analyze and report them.

3. Payment institutions and logistics companies: Payment institutions and logistics companies also play an important role. They provide e-commerce data by collecting transaction payment and logistics data. For example, payment institutions can provide data such as order quantity, payment method, and geographical distribution, while logistics companies can provide data such as shipment volume and delivery time.

4. Market research companies: Market research companies collect and organize data in the e-commerce field through their own research and analysis methods. They can obtain data by interviewing users, observing market dynamics, comparing competitors, etc., and provide information about the size of the e-commerce market, consumption trends, user insights, etc.

It should be noted that the data collection methods, data ranges, and data accuracy of different data providers may vary. Therefore, when analyzing and using e-commerce data, appropriate data sources should be selected according to specific needs and situations, and the reliability and accuracy of the data should be considered.