Microsoft SQL Server Analysis Services, SSAS, is an OLAP and data mining tool in Microsoft SQL Server. SSAS is used by organizations as a tool to analyze and understand information that may be spread across multiple databases or in different tables or files. Analysis Services provides a group of OLAP and data mining functions.

IBM DB2 is a relational database management system for enterprise-wide solutions developed by IBM. A relational database is a database in which all of the data is logically contained in tables. These databases are organized according to the relational model. In a relational database like IBM DB2, referential integrity ensures data integrity by enforcing rules with referential constraints, check constraints, and triggers.