id, tag_name, tag_count, pinyin, first_char, create_by, create_time, update_by, update_time select from system_labels where tag_name = #{tagName,jdbcType=VARCHAR} SELECT DISTINCT first_char FROM `system_labels` order by first_char select id,tag_name as 'tagName',tag_count as 'tagCount',CONCAT(FLOOR((RAND() * 7)),'') AS cls from system_labels where first_char=#{firstChar,jdbcType=VARCHAR} delete from system_labels where tag_name = #{tagName,jdbcType=VARCHAR} select from system_labels order by tag_count desc select from system_labels order by tag_count desc