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I'm trying to use a Merge Join component to do a Full Outer Join on two data sets. &nbsp;However after the Merge Join task is done, there are rows with all NULL values. &nbsp;Why this happens and how can I fix it? &nbsp;Thanks.
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I'm trying to use a Merge Join component to do a Full Outer Join on two data sets.  However after the Merge Join task is done, there are rows with all NULL values.  Why this happens and how can I fix it?  Thanks.

In SSIS, why Merge Join creates rows with all NULL value?

Microsoft SQL Server 2008 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. Major improvements include the  Always On technologies and support for unstructured data types.

Microsoft SQL Server 2008

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.