In this article, the author explores four ways to handle automatic ID generation in Sequelize for PostgreSQL and YugabyteDB: Auto-incrementing (SERIAL data type), Sequence-caching, Client-Side Sequencing, and UUID-generation. The author discusses the pros and cons of each approach, including latency costs, memory constraints, and performance benefits. The article concludes that the choice of ID generation method depends on the specific requirements of the application, such as infrequent writes, low-latency writes, or distributed deployments.