SSIS Tutorials - Union All Transformation | Combine data from multiple sources
In this tutorial, we will learn " How to combine data from multiple homogeneous or heterogeneous source" by using Union All Transformation in your SSIS Package.
The Union All transformation combines multiple inputs into one output. For example, the outputs from five different Flat File sources can be inputs to the Union All transformation and combined into one output.
The transformation inputs are added to the transformation output one after the other; no reordering of rows occurs. If the package requires a sorted output, you should use the Merge transformation instead of the Union All transformation.
Union All Transformation in SSIS does not follow any particular order while merging the data and storing in the destination table. Supports multiple unsorted inputs and duplicate records can be possible in the final output file. It does have any error output.
If the mapped columns contain string data and the output column is shorter in length than the input column, the output column is automatically increased in length to contain the input column. Input columns that are not mapped to output columns are set to null values in the output columns.
Used Components -
1. Data Flow Task
2. Source Assistants - Flat File, Csv file and SQL Server
3. Merge Join Transformation : Merge the sorted inputs
4. Sort Transformation : To Sort the data
5. Row Sampling: To watch the final output
To Learn more, please visit us at -
http://www.sql-datatools.com.
On this page of the site you can watch the video online SSIS Tutorials - Union All Transformation | Combine data from multiple sources with a duration of hours minute second in good quality, which was uploaded by the user Mukesh Singh 19 June 2019, share the link with friends and acquaintances, this video has already been watched 5,727 times on youtube and it was liked by 25 viewers. Enjoy your viewing!
