Millal võib andmebaasis primaarvõtme kasutamine olla soovimatu või ebasobiv?

Using a primary key in a database can be undesirable or impractical in the following cases:

• Temporary or log tables — if the data is used temporarily and does not require a unique identification.
• Tables with duplicate records, where uniqueness is not important, for example, an event log without the need for a unique identifier.
• Very large tables with high write load, where maintaining a primary key index can reduce performance.
• Cases where data is aggregated or used as cache, and the uniqueness of records is not critical.

However, even in such cases, it is generally recommended to have at least one unique identifier to facilitate working with data and ensure integrity.