Maintaining online

In the multi-dimensional model of data warehouses, data drawn from multiple sources is organized into fact tables and dimension tables. Data cubes pre-compute the aggregations of measurements along combinations of dimensions to speed up the processing of Online Analytical Processing (OLAP) queries. When the underlying fact tables or dimension tables change over time, data cubes need to be incrementally maintained to reflect these changes. In this thesis, we study the problem of incrementally maintaining data cubes under slowly changing dimensions.

22p runthenight05 01-03-2023 9 3   Download

Using Online Redo Log Files Online redo log files provide the means to redo transactions in the event of a database failure. Every transaction is written synchronously to the Redo Log Buffer, then gets flushed to the online redo log files in order to provide a recovery mechanism in case of media failure. (With exceptions such as direct load inserts in objects with the NOLOGGING clause enabled.) This includes transactions that have not yet been committed, undo segment information, and schema and object management statements.

30p trinh02 28-01-2013 60 6   Download

This is an online customer relationship management program as well as a groupware and a marketing tool also used for cellular company ‘Mycell’. The CRM module helps admin to identify and maintain their customers and employees. Customers can contact with the plan responsibles and add, edit or delete their own personal profile. They can view different products details, ask their queries, give suggestions and provide feedback for the product which they are using.

14p ken1802 06-04-2011 114 20   Download