1.字段内容

2.想得到的效果

步骤1中，每一条记录的FJ字段，根据分号，拆分成多条，如下图所示：

3.具体实现

说明：

SELECT DISTINCT
     substring_index(substring_index(a.要拆分的字段, '分隔字符', b.help_topic_id + 1), '分隔字符',- 1) as 拆分后字段别名
FROM 实际表名 a
    JOIN mysql.help_topic b ON b.help_topic_id < (length(a.要拆分的字段) - length(REPLACE(a.要拆分的字段, '分隔字符', '')) + 1)
WHERE a.ID = 2082894;

实现：

SELECT DISTINCT
     substring_index(substring_index(a.fj, ';', b.help_topic_id + 1), ';',- 1) as fj_id
FROM temporary_traffic_permit_info a
    JOIN mysql.help_topic b ON b.help_topic_id < (length(a.fj) - length(REPLACE(a.fj, ';', '')) + 1)
WHERE a.ID = 2082894;