star-schema_开发者

Star schema modeling - many-to-many

I\'m building a data warehouse based on NFL statistics for educational purposes as I learn this paradigm - I have the following modelling problem[详细]

2023-04-09 17:12 分类：问答

What is exactly a measure in star schema in data warehouse design?

Star schema consists of dimension and fact tables. Fact tables contain foreign keys for each dimension and in additio开发者_如何学JAVAn to that, it contains \"measures\". What exactly comprises of th[详细]

2023-04-09 11:02 分类：问答

Is a snowflake schema better than a star schema for data mining?

I know the basic difference between a star schema and a snowflake schema-a snowflake schema breaks down dimension tables into multiple tables in order to normalize them, a star schema has only one \"l[详细]

2023-03-23 03:22 分类：问答

How to populate star schema database with data from CSV file using jasperETL?

I\'m new to jasperETL and i have to populate star schema database with data from CSV file. Does anyone know how to perform this task? Maybe there is some tutorial or book, where i can find this inform[详细]

2023-03-22 14:29 分类：问答

Do we have to use fact table for reports?

开发者_如何学PythonI am working on building a data mart for reporting purpose. I am new to this field and looking for help.[详细]

2023-03-15 19:05 分类：问答

How to efficiently utilize 10+ computers to import data

We have flat files (CSV) with >200,000,000 rows, which we import into a star schema with 23 dimension tables. The biggest dimension table has 3 million rows. At the moment we run the importing process[详细]

2023-02-24 04:50 分类：问答

star schema for implementing near real time analytics with changing data

I implementing analytics for a medical software. The data to be processed is mainly appointment related. I\'m planing to implement star schema for generating reports. I have a few doubts[详细]

2023-01-23 06:58 分类：问答

star schema design - one column dimensions

I`m new to data warehousing, but I think my question can be relatively easy answered. I built a star schema, with a dimension table \'product\'. This table has a column \'PropertyName\' and a column[详细]

2023-01-16 06:54 分类：问答

How do I avoid complex joins in star schema?

My fact table holds a user score in a course he took. Some of the details of the course, which I have to show on the report, comes from more then one table (in the actual OLTP db).[详细]

2023-01-05 14:50 分类：问答