In the school example, the primary key used to identify each member of staff in the teacher table is Staff ID. A foreign key is a primary key from one table that appears in another table to link ...

Code: Table: documents documentid INT primary key name VARCHAR(255 ... I'm writing this app in ASP.NET/C#, with a MySQL backend. Should I set up a foreign key constraint? How would I go about ...

MySQL table primary keys and unique indexes prevent multiple rows with the same index from being added to the table. If you try to insert a duplicate row with a standard INSERT statement ...

Across physical tables, shared columns are the evidence of a foreign key relationship. The columns comprising the primary key of the table on the one-side of the relationship are repeated on the table ...