Hi,
Sorry for the subject - I just do not know for what to search of what to
ask - I actually do not know where is exactly my problem :-(
I have a database containing thousands of HTML pages ("topics"). There
is a fulltext index for these topics. First there is a table containing
all single words. Each word is identified by its "fulltextID":
CREATE TABLE fulltext(
fulltextID INTEGER PRIMARY KEY,
word VARCHAR(100) COLLATE NOCASE
);
Now there is a linking table between the words and the HTML pages (topics):
CREATE TABLE topic_fulltext(
topicID INTEGER,
fulltextID INTEGER,
PRIMARY KEY(topicID, fulltextID)
);
Finding a topic containing a specific word is not too hard:
SELECT topic_fulltext.topicID
FROM fulltext
JOIN topic_fulltext ON topic_fulltext.fulltextID = fulltext.fulltextID
WHERE word LIKE 'Word%';
But now I want to be able to search with more complex queries. For example:
* List all topics containing (word1 AND word2)
* List all topics containing (word1 OR word2)
* List all topics containing (word1 AND word2 AND ... AND word10)
* List all topics containing ((word1 OR word2) AND word3 OR word3)
* ...
But now I have no clue how to accomplish this query. I just can't extend
my single-word query from above :-(
Can anyone give me a hint?
Thank you very much,
Luke
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