关系在线分析处理 (ROLAP):
ROLAP 用于大数据量,其中数据存储在关系表中。在 ROLAP 中,创建了数据的静态多维视图。
多维在线分析处理 (MOLAP):
MOLAP 用于有限的数据量,其中数据存储在多维数组中。在 MOLAP 中,创建了数据的动态多维视图。
ROLAP 和 MOLAP 的主要区别在于,在 ROLAP 中,数据是从数据仓库中获取的。另一方面,在 MOLAP 中,数据是从 MDDB 数据库中获取的。这两者之间的通用术语是OLAP 。
我们来看看 ROLAP 和 MOLAP 的区别:
S.NO | ROLAP | MOLAP |
---|---|---|
1. | ROLAP stands for Relational Online Analytical Processing. | While MOLAP stands for Multidimensional Online Analytical Processing. |
2. | ROLAP is used for large data volumes. | While it is used for limited data volumes. |
3. | The access of ROLAP is slow. | While the access of MOLAP is fast. |
4. | In ROLAP, Data is stored in relation tables. | While in MOLAP, Data is stored in multidimensional array. |
5. | In ROLAP, Data is fetched from data-warehouse. | While in MOLAP, Data is fetched from MDDBs database. |
6. | In ROLAP, Complicated sql queries are used. | While in MOLAP, Sparse matrix is used. |
7. | In ROLAP, Static multidimensional view of data is created. | While in MOLAP, Dynamic multidimensional view of data is created. |