You’ve probably heard the terms OLTP and OLAP in the context of data storage. When planning SQL Server 2008 BI solutions, you need to have a solid understanding of these systems as well as the implications of using them for your particular requirements.
OLTP stands for online transactional processing and is used to describe a relational data store that is designed and optimized for transactional activities. Transactional activities are defined as inserts, updates, and deletes to rows in tables. A typical design for this type of data storage system is to create a large number of normalized tables in a single source database.