How to create a composite Primary Key on a Table
26856
How do I specify unique constraint for multiple columns in MySQL?
133675
EntityFramework - contains query of composite key
105896
Finding a Primary Key Constraint on the fly in SQL Server 2005
10738
How do I make a row generator in MySQL?
58903
How is INDEX on Composite Primary Key in mysql?
77984
Changing MySQL primary key when foreign key contraints exist
50167
Is there any reason for an index to contain the primary key?
145311
Generate an increment ID that is unique for a given value of a foreign key
110818
SQL Server add auto increment primary key to existing table
71713
PostgreSQL - "DISTINCT ON" and "GROUP BY" syntax
36267
insert query with varchar as data type for primary key
158985
Can a foreign key be NULL and/or duplicate?
97744
Setting up foreign keys in phpMyAdmin?
28175
How to create id with AUTO_INCREMENT on Oracle?
105458
CREATE TYPE on MySQL
134456
Does specifying a foreign key make it an index?
33461
Mapping ManyToMany with composite Primary key and Annotation: