The user name can be changed, Taobao wants to give everyone the opportunity to "be a new person" In the data table of the database, there is usually a primary key as a unique index, and the existence of the primary key represents the integrity of the table structure, the records of the table must have uniquely distinguishable fields, the primary key is used for foreign key associations of other tables, and Modification and deletion of this record. To put it simply, the primary key is the element for the platform to identify users in the database. If you want to modify it, it can be regarded as a major operation on the database. Not to mention, the member name/ID itself is not only used in products of the entire Taobao ecosystem, such as Xianyu, Alipay,
Alibaba Cloud, Alibaba, Alimama, etc. In addition, the data accumulated behind the Taobao member name/ID is more complicated, and it maintains various factors including historical orders, sellers, logistics, etc., so the difficulty of modification is also greatly increased, so compared with the risk of losing user data, maintain the status quo. Obviously a better sms marketing service choice. The user name can be changed, Taobao wants to give everyone the opportunity to "be a new person" Two years ago, Taobao did not want to allow users to modify the membership name/ID, or based on the Occam's razor principle of "if not necessary, do not add entities". After all, for Internet companies, especially products like Taobao that have existed for nearly 20 years, substantial changes often mean uncontrollable.