Composite Foreign key to single primary key
54977
Many to Many and Weak Entities
28430
Are composite primary keys bad practice?
77391
How to implement a super class, sub class relationship in the database?
89217
Adding Foreign Key Error
86642
Sqlite primary key on multiple columns
88539
What is the difference between Primary Key and unique key constraint?
26856
How do I specify unique constraint for multiple columns in MySQL?
47564
Foreign Key column mapped to multiple primary keys
110818
SQL Server add auto increment primary key to existing table
104408
Hibernate One-To-Many Unidirectional on an existing DB
112312
Create unique sequence per set of rows sharing the same foreign key value
101199
PostgreSQL foreign key not existing, issue of inheritance?
155762
ON DELETE CASCADE not deleting entry for foreign key
73190
sql primary key and index
97744
Setting up foreign keys in phpMyAdmin?
138925
How to convert multiple duplicate columns as single row with appreciated values
33461
Mapping ManyToMany with composite Primary key and Annotation: