Do Core Data Entities Need Primary Keys?

This article investigates whether developers must add a primary key property to Core Data entities when using SQLite as the persistent store. It explains the purpose of primary keys in relational databases for unique row identification and demonstrates through an Xcode sample project (Zootastic) how Core Data automatically manages unique identifiers under the hood. The author shows how to enable SQL debug logging to reveal Core Data's internal handling of primary keys, concluding that explicit primary key attributes are typically unnecessary due to Core Data's built-in mechanisms. Targeted at iOS/macOS developers working with Core Data.