有一个问题：在mysql中，我使用全文搜索，查询是“SELECT * FROM media f WHERE MATCH（f.title）AGAINST（' 2454911 ' IN BOOLEAN MODE）" the DB have 1 row with data of " title " column is "很快" The result is 0 row. But when I change data to " Soonn ", and in the query, I change to " soonn ", the result is 1 row. Why the data is "很快”，结果是0行