$results  = $dbh->selectall_arrayref("SELECT ID, sentence  FROM texts WHERE sentence LIKE '%$query%'"

##</code><code>##

$results  = $dbh->selectall_arrayref("SELECT ID, sentence  FROM texts WHERE sentence LIKE ' %$query% '"
<\code>
<p>
Of course it doesn't work as I expected:
<code>
$query="tag"
sentence1= "Put tags around your paragraphs"
sentence2= "Put a tag around your paragraphs"
sentence3= "I am tagging your paragraphs"
sentence4= "There are many advantages"