When using DAYU to design information architecture, it is recommended to follow the following principles:

  1. The logical data entity cannot exist independently from the business object, and cannot be attributed to multiple business objects. The relationship between the business object and the logical data entity is 1:1 or 1:N, and N:1 is not allowed.

  2. Logical data entities and physical tables should try to maintain a 1:1 relationship. (One-to-one mode)

  3. In some special scenarios, a 1:N relationship between logical data entities and physical tables is allowed. (Such as excessive data volume, sub-database, cross-product, distributed deployment, etc.) (master-slave mode, master expansion mode)