求教大神 access语句优化

SELECT Tab1.*,Tab2.* FROM
Tab1,Tab2
WHERE Tab1.field1 LIKE '*'+Tab2.field1+'*' AND NOT EXISTS (SELECT field1,field2,field3,field4 FROM Tab3 WHERE Tab1.field1=Tab3.field1 AND Tab1.field2=Tab3.field2 AND Tab1.field3=Tab3.field3 AND Tab1.field4=Tab3.field4)