A test condition filters the records processed by a test in a single table or table pair. To increase the performance of a particular test defined for a single table or table pair, add a test condition.
For example, you want to exclude telephone extension numbers from a VALUE test for a table pair. You want to exclude telephone extension numbers that contain fewer than three characters.
Create the VALUE test based on the following criteria:
Table A.EXT = Table B.EXT
Condition A = LENGTH(EXT)<3
Condition B = LENGTH(EXT)<3
Add a test condition instead of a WHERE clause when you want to apply the filter on a particular test. If you enter a test condition and WHERE clause in a single table or table pair, Data Validation Option applies the WHERE clause to all tests before it applies the test condition.
If you create a test condition and WHERE clause on a joined table pair, Data Validation Option applies the WHERE clause before it joins the tables. Data Validation Option applies the test condition after it joins the tables.