您不能在 SQL 中的特定列更新上触发.它应用于一行.

You can't trigger on a particular column update in SQL. It is applied on a row.

您可以使用 IF 语句将 columm 的条件放在触发器中，如下所示:

You can put your condition for columm in your trigger with an IF statement, as below:

DELIMITER //
CREATE TRIGGER myTrigger AFTER UPDATE ON myTable
FOR EACH ROW
BEGIN
   IF !(NEW.column1 <=> OLD.column1) THEN
      --type your statements here
   END IF;
END;//
DELIMITER ;