在PHP中查询大MySql表效率？

Question

My database has almost 15.000.000 entries. Each entry is a phrase and each phrase starts in upper case and ends in a point (.) ex: "This is a sample phrase."

I need to get 10 random phrases that contain a specific word ( $q ). Because $q can be in the beginning of the phrase i will use also $q_upper for the query.

Using this query:

$res = mysqli_query($db,"SELECT quotes FROM corpus WHERE quotes LIKE '% ".$q." %' or quotes LIKE '% ".$q.".' or quotes '".$q_upper." %' order BY RAND() LIMIT 10");

Because its a large database it takes around 10 sec and a lot of resources to deliver results.

Is there a way I can optimize this query (or maybe split the database ) in order to make it efficiency.

Answer 1

Use a case-folding collation -- That gets rid of q_upper.

Use FULLTEXT instead of LIKE -- that gives a lot of speed.