Which of the following transformation cannot be implemented using Joiner transformation?
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Left Outer join
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Right Outer join
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Full outer join
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Cartesian product
The Joiner transformation in Informatica does NOT support full outer join. It supports normal join, master outer join, detail outer join, and a few other variants, but not a true full outer join where all records from both sides are included regardless of matches. Left outer (A), right outer (B), and Cartesian product (D) can all be implemented using Joiner transformation with appropriate configuration.
To answer this question, we need to understand the capabilities and limitations of the Joiner transformation in data integration tools.
The Joiner transformation is typically used to combine data from two or more sources based on a common key. It performs either an inner join, left outer join, or right outer join. However, it does not support a full outer join or Cartesian product.
Let's go through each option to understand why it is correct or incorrect:
Option A) Left Outer join - This option is correct because the Joiner transformation can perform a left outer join. It keeps all the records from the left source and matching records from the right source.
Option B) Right Outer join - This option is correct because the Joiner transformation can perform a right outer join. It keeps all the records from the right source and matching records from the left source.
Option C) Full outer join - This option is incorrect because the Joiner transformation cannot perform a full outer join. A full outer join combines all the records from both sources, including non-matching records.
Option D) Cartesian product - This option is incorrect because the Joiner transformation cannot perform a Cartesian product. A Cartesian product combines every row from the left source with every row from the right source, resulting in a large number of records.
The correct answer is C) Full outer join. The Joiner transformation cannot implement a full outer join.