Top "Data-warehouse" questions

A data warehouse (DW) is a database specifically structured/designed to aid in querying, analyzing and reporting (generating reports out of) of current and historical data.

What does "bulk load" mean?

Jumping from article to article, I can see everywhere the expression "bulk loading". What does it really (technically) mean? What …

database terminology data-warehouse bulk-load
Where I can download sample database which can be used as data warehouse?

Where I can download sample database which can be used for data warehouse creation? It should't be sample from Microsoft (…

database data-warehouse
Design of a data warehouse with more than one fact tables

I'm new to data warehousing. First, I want to precise than my copy of The Data Warehouse Toolkit is on …

data-warehouse fact-table
What is a staging table?

Are staging tables used only in Data warehouse project or in any SSIS Project? I would like to know what …

ssis etl data-warehouse staging-table
Benefits of using Staging Database while designing Data Warehouse

I am in process of designing a Data Warehouse Architecture. While exploring various options to Extract data from Production and …

database-design data-warehouse olap
Time and date dimension in data warehouse

I'm building a data warehouse. Each fact has it's timestamp. I need to create reports by day, month, quarter but …

data-warehouse infobright
Group by vs Partition by in Oracle

I am writing a query to fetch records from a Oracle warehouse. Its a simple Select Query with joins on …

sql oracle data-warehouse analytic-functions
Schema evolution in parquet format

Currently we are using Avro data format in production. Out of several good points using Avro, we know that it …

apache-spark hadoop data-warehouse avro parquet
Advantages of databases like Greenplum or Vertica compared to MongoDB or Cassandra

I am currently working in a few projects with MongoDB and Apache Cassandra respectively. I am also using Solr a …

mongodb cassandra data-warehouse vertica greenplum
NoSql and Data-Warehouse

What are the relations between NoSql and Data-Warehouse technologies/theories? What concepts they share? What are the basic differences between …

nosql data-warehouse