mysql行转列，分割逗号

不常用，但是现在的业务经常用到

https://blog.csdn.net/weixin_39849054/article/details/111277625

 

 

https://blog.csdn.net/u012604745/article/details/80642015

 

https://www.cnblogs.com/fps2tao/p/15330316.html

 

https://blog.csdn.net/u012604745/article/details/80642015