delete from testA where title not in(select title from testB);

위의 쿼리를 적용할려구하는데요...
아래처럼 짜다보가 포기했습니다.
sqlite로 적용해보려고하니깐 힘드네요 ㅠ
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Uri uriA = Ex.testA.CONTENT_URI;
Uri uriB = Ex.testB.CONTENT_URI;

 selection = Ex.testA.TITLE + " not in (" +  Ex.testB.TITLE + ")";
 selectionArgs = null;
 getContentResolver().delete(uriA, selection, selectionArgs);