我写了这样的东西，但它不起作用。怎么办？
mysql> create trigger deleteStudentTrigger
-> before delete on tblStudent for each row
-> begin
-> insert into tblDeletedStudents select * from tblStudent where StudentId = new.StudentId;
-> end;$
ERROR 1363 (HY000): There is no NEW row in on DELETE trigger
最佳答案
如错误中所述，没有新行，只有旧行(因为当您删除某些内容时，它不是新的，您知道) 所以应该是这样
mysql> create trigger deleteStudentTrigger
-> before delete on tblStudent for each row
-> begin
-> insert into tblDeletedStudents select * from tblStudent where StudentId = old.StudentId;
-> end;$
有关更多信息，请参阅 MySQL 文档
关于MySQL触发器在删除操作之前插入另一个表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43841751/