Some database designers may feel that it’s OK to arbitrarily assign all dimensional foreign keys as part of a fact’s primary key even when one or more do not actually contribute to the fact table’s ...

The primary keys provide administrator level access to Cosmos DB instances with full read/write/delete permissions. The database service also requires users to have secondary keys as well to make ...

This, or these, attribute (s) are the candidate key (s) for the structure. The candidate key is also known as the primary key, or if a structure has multiple candidate keys, then one of them is ...

Duplicate and Ignore on MySQL Inserts. 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 ...