SELECT
id,
JSON_UNQUOTE(
JSON_EXTRACT(
business_tags,
CONCAT('$[', help_topic.help_topic_id, ']')
)
) AS tag_name
FROM
tag
JOIN mysql.help_topic ON help_topic.help_topic_id < JSON_LENGTH(business_tags)
WHERE
JSON_VALID(business_tags)
AND JSON_LENGTH(business_tags);
主要使用的高级用法为mysql.help_topic
这是一个用来生成序列的好东西