Filter select in SQLite using single query

I need to query a table like this:

select phrase_id
from direct_words 
where knowledge_id = X and dictionary_word_id = Y;

but I only want to retrieve the rows where the same pair (knowledge_id = X and dictionary_word_id = Y) doesn't exist in another table (top_words). This can be done, applying the query:

select top_id from top_words where knowledge_id = X and dictionary_word_id = Y;

for each returned result from the first query and rejecting if the开发者_如何转开发 second query has a row count above 0.

Is this possible to do in a single query to SQLite?

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Either the left join as Andrey suggested, or ...AND NOT EXISTS ( select x from TOP_WORDS where .... )

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select dw.phrase_id
from direct_words dw
left outer join top_words tw on dw.phrase_id=tw.phrase_id
where dw.knowledge_id = X and dw.dictionary_word_id = Y and tw.phrase_id is NULL