Question

I have an array with a list of keywords,

$arr = array('london','england','football',...);

The array could have N^th keywords.

I need to use this on a sql query but i dont want to do too many repetitions like this.

select * from t1 where title LIKE('%$arr[0]%') OR title LIKE('%$arr[1]%') [...]

just need a better solution as each keyword filters out the records.

thnx

Answer 1

One solution would be to create a lookup table that is populated with the rowid and keywordid whenever a row is created or changed.

Then you can skip all the LIKE and get much more performance.

A trigger on insert and update should work but it will cost a little more performance on insert and update.

You would just use

SELECT * FROM t1 WHERE id in (SELECT id FROM lookup WHERE keywordid IN ())

And if the keywords are many you could use a sub query more to get the keyword id’s or if fewer use a cached lookup structure directly in code, dictionary or likewise.