SQL is neither ... impact of the primary key on common queries, but how it will play in joins when it appears as a foreign key in another table, and how it will affect the data’s locality ...

Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field ... I’ll add some data to my tables.

This, or these, attribute(s) are the candidate key(s) for the structure. The candidate key is also known as the primary key ... Ubiquitous generated keys ultimately mean that the semantics of the data ...