OLAP
OLAP 数据库 常见于多维分析场景，支持较快地聚合、分析海量数据，用于发现数据的内在联系、分析报告。
特点：
IBM
OLAP (for online analytical processing) is software for performing multidimensional analysis at high speeds on large volumes of data from a data warehouse, data mart, or some other unified, centralized data store.[1]
Microsoft
Online analytical processing (OLAP) is a technology that organizes large business databases and supports complex analysis. It can be used to perform complex analytical queries without negatively affecting transactional systems.[2]