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SSIS Lookup Transformation

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In this tutorial I will explain and give a simple example of SSIS lookup transformation.

Let's start with short explanation of the term lookup. Lookup takes input value and searches for a row in table that contains this value in the specified field; once it finds it you are able to extract values from different fields that belong to the same "row".

 Below is a simple example. I have a country table which contains field ID and country (right side). My input value is country with value UK and I want to get ID for this country.

Lookup takes UK then searches Country Field for the entry and when it finds it it returns the ID which 3.

ssis lookup transformation explanation

Now that we covered basics let's explain when you would use lookup. There are multiple scenarios however I will limit myself to explain one. Because you use SSIS you most likely are involved in building a data warehouse. During your extract you get source system key (business key) that you want to find in your dimension table and replace with ID (surrogate key) which will be used to load your Fact Table.

NOTE: This example is a simple lookup example using dimension table that does not track history so it should be used only for training purposes and specific scenarios. I will try to write more articles covering typical data warehouse lookups soon.

SSIS Lookup

In this section I will show you how to configure SSIS Lookup transformation (if you are new to SSIS check How to create SSIS package)

Create a new package add data flow in source control. Go to data flow and add source item; I will use OLE DB Source extracts Country field and I will use this field as input for lookup. See below screenshot of data flow and sample of data.

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T-SQL SSIS SSRS 79 Mini Courses 529 Pages 287 Videos 314 Articles
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I can't speak highly enough of the quality MSBI materials industry practitioners with varying level of experience and exposure can benefit from this website. Their structured learning plan and courses, DIY projects, webinars and relevant resources go a very long way. I've gained a whole new perspective on delivering client BI projects to highest standards by employing best practices recommended on this website. Best quality MSBI training online suite I have used and least expensive too.

Franklin Demilade Osinowo

Best and affordable BI Training platform in the web. KEBI Academy doesn't provide training on BI rather their approach is to make you learn BI by yourself. Self Learning is always the best approach and I recommend KEBI Academy.

Jaiyaram Mahendran


You both are doing a great job by sharing your knowledge and experience, it helps many people who want to learn MSBI from the starting point and also for an experienced person to get to know more about MSBI. Thank you and keep sharing your MSBI knowledge and experience.

Shweta Patel

Great work on the videos. I have been enjoying them.

Patt Nelson


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