Join tables if you want to run a VALUE or an OUTER_VALUE test. Data Validation Option ignores joins for all set and aggregate tests.
The fields included in a join condition must have compatible datatypes, precisions, and scales. For example, you can join an INT field to a DECIMAL field, but not to a DATETIME or VARCHAR field.
Data Validation Option supports joins on fields with the following datatypes: datetime, numeric, and string. Joins are not allowed on binary/other datatypes.
Data Validation Option joins tables in a table pair based on an inner equijoin by default.
For an XML data source, only child elements of the selected XML group appear as possible join fields.
You can create multiple join conditions in a table join for a joined table pair.
If you specify a file list connection and the fields in the join condition are not unique among all files in the file list, the join fails.