What is the difference between a cube and a tabular model in SSAS?

In SQL Server Analysis Services (SSAS), there are two main types of models used for data analysis: Cubes and Tabular models.

Cube:

A cube is a multidimensional model that organizes data into dimensions and measures. It uses a concept called OLAP (Online Analytical Processing) to provide complex calculations and aggregations.

Tabular Model:

A tabular model is a columnar model that stores data in tables similar to relational databases. It uses in-memory technology for faster data processing and queries.

Differences:

• Cube models are multidimensional, while tabular models are columnar.
• Cube models use OLAP for complex calculations, while tabular models use in-memory technology.
• Cube models are more suitable for complex analytical queries, while tabular models are better for simpler calculations and faster querying.

Both cube and tabular models have their own strengths and weaknesses, and the choice between them depends on the specific requirements of the analysis project.