Could you post DDL for both tables? Some comments on what the columns are could be useful.

Additionaly, you could use the system views to find any Primary keys or Foreign keys on both tables.

SELECT *

FROM sys.objects

WHERE type IN ('F', 'PK')

AND parent_object_id IN( OBJECT_ID( 'Saldos_Emp', 'U'), OBJECT_ID( 'AnotherTable', 'U'))