How do you use Slowly Changing Dimension transformation in SSIS?

To get started with it:

Table of Contents

Open BIDS or Visual Studio.
Create a new SSIS project.
Add a Data Flow task to Package.
On the Data flow tab add an OLE DB Source and a Slowly Changing Dimension transformation.
To provide the transformation with input data, connect the output of the OLE DB Source to the Slowly Changing Dimension.

How do I use SCD Type 2 in SSIS?

SSIS Slowly Changing Dimension Type 2 example. STEP 1: Open BIDS and Drag and drop the data flow task from the toolbox to control flow and name it as SSIS Slowly Changing Dimension Type 2. Double click on it will open the data flow tab. STEP 3: Double click on OLE DB source in the data flow region.

How does SCD work in SSIS?

SCD or Slowly Changing Dimension it is one of the component of SSIS toolbox. This component is used if you want insert or update data records in dimension tables. Simplest explanation can be it compares incoming source data with existing destination dimension table data using a Business Key (Unique Key).

What is the alternative of SCD Type 1 & 2 in SSIS?

Option 2: SQL Server MERGE Statement T-SQL MERGE statement first introduced in SQL Server 2008 does a pretty good job in handling Type 1 and Type 2 SCD. Oracle also has a MERGE equivalent. A good post on usage of MERGE statement for SCD can be found in Kimball Group.

What is Type 2 slowly changing dimension?

A Type 2 SCD retains the full history of values. When the value of a chosen attribute changes, the current record is closed. A new record is created with the changed data values and this new record becomes the current record.

How do you test for SCD Type 2?

Testing Type 2 Slowly Changing Dimensions using ETL Validator

Testing SCD Type 2 Dimensions.
Test 1: Verifying the Current Data.
Test 2: Verifying the uniqueness of the key columns in the SCD.
Test 3: Verifying that historical data is preserved and new records are getting created.

What is the difference between SCD Type 1 and Type 2?

Type 1 dimension mapping (SCD1): This keeps only current data and does not maintain historical data. Note : Use SCD1 mapping when you do not want history of previous data. Type 2 dimension/version number mapping (SCD2): This keeps current as well as historical data in the table.

What is SCD1 and SCD2 in SSIS?

SCD Stands for Slowly changing dimensions. SCD1: only maintained updated values. Ex: a customer address modified we update existing record with new address. SCD2: maintaining historical information and current information by using. A) Effective Date.

What is the difference between SCD1 SCD2 and SCD3?

Difference : SCD2 is unlimited history and SCD3 is limited history. Explanation: 1- Using SCD2 you can save unlimited history with the help of the Surrogate Key .