How to put this particular constraint on this link table in MySQL?
139969
How to represent it with UNIQUE indexes and foreign keys?
113703
How to correctly handle dates in queries constraints
41607
MySQL offset infinite rows
89949
Easy mysql question regarding primary keys and an insert
95344
How do I insert a row which contains a foreign key?
80577
How to delete duplicates on a MySQL table?
41165
Foreign key constraints failures
71752
How to define a custom ORDER BY order in mySQL
25346
Order a MySQL table by two columns
105889
PostgreSQL multi-column unique constraint and NULL values
152170
How to convert this table to a "long table"
128621
Mysql - Add auto_increment to primary key
32901
Adding a constraint to prevent duplicates in SQL Update Trigger
148559
Using the correct, or preferable, not equal operator in MySQL
157873
How do I use on delete cascade in mysql?
72631
MySQL - Operand should contain 1 column(s)
90150
How do I add indices to MySQL tables?