The column (field) in a relational database that uniquely identifies the row in the table. For example, account number is often a primary key. A "composite primary key" or "super key" is made up of ...

When working on a multidimensional design, every fact table within scope should be handled with care. In an ideal world, each low-level fact table represents the metrics related to a business event.

One of the principles within relational theory is that each entity’s row or tuple be uniquely identifiable. This means the defined structure includes some combination of attributes whose populated ...

10 tips for choosing between a surrogate and natural primary key Your email has been sent The superiority of surrogate versus natural keys is a hotly debated topic among database developers. Susan ...

Every JPA entity has a primary key, but some entities have more than one value as their primary key. In this case, you need to use a composite key. This Java tip introduces you to using composite keys ...

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 ...

Thousands of organizations using the Cosmos DB service on Microsoft Azure need to regenerate their primary read-write keys after researchers found a vulnerability that would have given external ...