- [ ] **Federated queries, Full-text search using MQL** - [x] Realm Sync and Realm Backend - [x] mongodb cursor - [ ] Embedded documents, $lookup & $graphLookup - alternative for `JOIN` - [ ] Aggregation Pipeline - alternative for `GROUP_BY` - [ ] On-demand Materialized Views - [ ] [relational-migrator](https://www.mongodb.com/zh-cn/docs/relational-migrator)
JOINGROUP_BY