如果对于业务数据进行多角度的查询（如待办列表和已办列表需要针对某几个业

If you perform multi-angle queries on business data (for example, the to-do list and the completed list need to be retrieved for certain business fields), you need to set persistence when modeling the data model group, then the business data instance will be stored in the storage At the same time, it is split according to different data models and stored in the relational database synchronously for multi-table related query.

If business data is queried from multiple perspectives (for example, to-do list and to-do list need to be retrieved for several business fields), persistence needs to be set when the data model is built. At this time, business data instances will be split according to different data models during storage and synchronously saved to the relational database for multi table Association query.

If the business data is queried from multiple angles (for example, to-do list and done list need to be searched for certain business fields), persistence should be set when modeling the data model group. At this time, business data instances will be split according to different data models and stored in the relational database synchronously for multi-table association query.