1. A method comprising: obtaining a target query; and determining a normalized query according to the obtained target query, the determining including: obtaining session information in a search log; determining a vote similarity degree between a single query and the target query based on the session information, including: obtaining all queries appearing in a single session, calculating a number of votes for each query, the calculating including counting the single query appearing before the target query in the single session as a vote from the single query to the target query, and determining the vote similarity degree between the single query and the target query according to the calculated number of votes; determining a correlation degree between the single query and the target query based in part on the vote similarity degree; and determining the normalized query based in part on the correlation degree between the single query and the target query.