mysql - 删除多行时在 MySQL 表上触发

Question

我编写了一个在删除行之前运行的触发器，该触发器更新汇总该表中数据的表。当我一次删除一行时，触发器运行良好。但是，如果我要使用类似的语句一次删除多行

DELETE FROM myTable WHERE id BETWEEN 1 and 100;

触发器是在删除下一行之前完全在第一行运行还是触发器会同时运行？

Answer 1

触发器将针对每一行完全运行，请参阅 Trigger FAQ

A.5.3: Does MySQL 5.6 have statement-level or row-level triggers?

In MySQL 5.6, all triggers are FOR EACH ROW—that is, the trigger is activated for each row that is inserted, updated, or deleted. MySQL 5.6 does not support triggers using FOR EACH STATEMENT.

这对当前最新版本有效，MySQL 5.7也是。