How to find Unequal Values from Two Tables

Question

I am doing a left join query to compare the two tables for any values that do not equal each other on f9 and sumoff6 columns ONLY if the F1 columns are the same. If they are dif

Answer 1

The problem is that allocation_final.sumoff6 has a NULL value, and the WHERE condition filters out NULL values. Just test for this condition:

SELECT statement.f1, statement.f9
FROM statement LEFT JOIN
     allocation_final
     ON statement.[f1] = allocation_final[f1] 
WHERE [allocation_final].sumoff6 <> statement.f9 OR
      [allocation_final].sumoff6 IS NULL;

EDIT:

Perhaps your join is in the wrong direction:

SELECT allocation_final.f1, statement.f9, allocation_final.sumoff6
FROM allocation_final LEFT JOIN
     statement
     ON statement.[f1] = allocation_final[f1] 
WHERE allocation_final.sumoff6 <> statement.f9 OR
      statement.f9 IS NULL;

Based on your sample data, this would make more sense.