One pass SCD2 load: How to load a Slowly Changing Dimension Type 2 with one SQL Merge statement in Oracle

Uli Bethke DW Design, ETL, Oracle

The other day I came across a useful new feature in the Merge statement for SQL Server 2008. This new feature outputs merged rows for further processing, something which up until now (Oracle 11.1.0.7) is not possible in Oracle. This extra functionality can be used to load a Slowly Changing Dimension Type 2 in one SQL statement. As a result ...

About the author

Uli Bethke LinkedIn Profile

Uli has 18 years’ hands on experience as a consultant, architect, and manager in the data industry. He frequently speaks at conferences. Uli has architected and delivered data warehouses in Europe, North America, and South East Asia. He is a traveler between the worlds of traditional data warehousing and big data technologies.

Uli is a regular contributor to blogs and books, holds an Oracle ACE award, and chairs the the Hadoop User Group Ireland. He is also a co-founder and VP of the Irish chapter of DAMA, a non for profit global data management organization. He has co-founded the Irish Oracle Big Data User Group.

Create and Maintain Source to Target Map in OWB

Uli Bethke ETL, Oracle Warehouse Builder

One of the tasks during the ETL design process is to create a Source to Target Map. This maps fields from the source system to fields in the target data warehouse. Very often this is done in Excel. This approach has two disadvantages. First of all the definitions in the source to target map need to be transfered to your ...

About the author

Uli Bethke LinkedIn Profile

Uli has 18 years’ hands on experience as a consultant, architect, and manager in the data industry. He frequently speaks at conferences. Uli has architected and delivered data warehouses in Europe, North America, and South East Asia. He is a traveler between the worlds of traditional data warehousing and big data technologies.

Uli is a regular contributor to blogs and books, holds an Oracle ACE award, and chairs the the Hadoop User Group Ireland. He is also a co-founder and VP of the Irish chapter of DAMA, a non for profit global data management organization. He has co-founded the Irish Oracle Big Data User Group.