KNOWLEDGE BASE

Unexpected NULL Values from Right Table(s) After Joining Tables


Published: 31 Aug 2016
Last Modified Date: 31 Aug 2016

Issue

When joining tables, the right table(s) might have unexpected NULL values. The same table(s) does not have NULL values when connecting to that table by itself.

Environment

Tableau Desktop

Resolution

Ensure that the left and right tables have matching values for the linking field.

Cause

If the linking field in the left table does not have values that match the linking field in the right table, then no data will be imported from the right table.
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