MYSQL 行转列、列转行、多列转一行、一行转多列

https://blog.csdn.net/nanyangnongye/article/details/125217634

版本说明

mysql8.0

标签：case,end,when,一行,resuilt,转列,else,多列,subject
来源： https://www.cnblogs.com/shoshana-kong/p/16480868.html