Difference between Measure Group and Dimension in SSAS

In SQL Server Analysis Services (SSAS), a measure group represents a collection of measures that are related to each other and typically stored in a fact table. Measures are numerical values that can be aggregated, such as sales amount or quantity sold.

On the other hand, a dimension in SSAS is used to categorize and organize data into hierarchies or groups. Dimensions provide context to the measures and help in analyzing data from different perspectives. Examples of dimensions are time, geography, products, customers, etc.

Therefore, the key difference between a measure group and a dimension is that measure groups contain measures, while dimensions provide the context and structure for analyzing those measures in SSAS.