Database pattern with two types of owners for an object. Like how users and groups can make posts in FB
96449
Database schema for entities with two possible owner/parent types?
154212
Codeigniter Active Record 'where_or' grouping
21141
Finding if which users have a record type available to them using SOQL
34287
How to populate owner name instead of id from a child object
97261
Are nested transactions allowed in MySQL?
33461
Mapping ManyToMany with composite Primary key and Annotation:
123274
Multiple Linked Objects with unique Materials / Group Materials override
56506
How do I "parent" objects?
5002
How to model an entity type that can have different sets of attributes?
155109
Foreign key constraint may cause cycles or multiple cascade paths?
113811
Hibernate recursive many-to-many association with the same entity
146399
Database design for products with bundles of products
32665
What is the proper pattern for nested schemas in Mongoose/MongoDB?
142282
How to associate a user to multiple scheme of a database?
153070
INACTIVE_OWNER_OR_USER
26537
Possible to do a MySQL foreign key to one of two possible tables?
15073
How to normalize my db schema for a quiz application?