How to Exclude Records with Empty Business Unit Values in SnapLogic Source Query

Hello everyone, I am using a source query as below SELECT BUSINESS_UNIT AS DEGREE_UNIT,BU_DESCR AS DESCR FROM BUSINESS_UNIT_DIM WHERE or BUSINESS_UNIT != '' or BUSINESS_UNIT != ' ' GROUP BY BUSINESS_UNIT, BU_DESCR In the BUSINESS_UNIT_DIM table there is a row with BU_DESCR = 'Unassigned'and BUSINESS_UNIT = ' ' We want to discard this record in the target. Somehow Snaplogic is still picking this particular record up using this source query and failing at the target. How do I handle this situation. Any suggestions are welcome!