Data-intensive applications are systems built to handle vast amounts of data. As artificial intelligence (AI) applications increasingly rely on large datasets for training and operation, understanding how data is stored and retrieved becomes critical. The sources explore various strategies for managing data at scale, which are highly relevant to the needs of AI. Many AI workloads, particularly those involving large-scale data analysis or training, align with the characteristics of Online Analytical Processing (OLAP) systems. Unlike transactional systems (OLTP) that handle small, key-based lookups, analytic systems are optimized for scanning millions of records and computing aggregates across large datasets. Data warehouses, often containing read-only copies of data from various transactional systems, are designed specifically for these analytic patterns.