mysql json 字符串

https://blog.csdn.net/helloxiaozhe/article/details/86571387
https://blog.csdn.net/weixin_39632728/article/details/113430658
https://stackoverflow.com/questions/65394826/json-extract-error-invalid-json-text-in-argument-1-to-function-json-extract-m
https://dba.stackexchange.com/questions/192208/mysql-return-json-from-a-standard-sql-query
https://www.digitalocean.com/community/tutorials/working-with-json-in-mysql