结果由多行组成

Question

我运行两个简单的查询，但MySQL显示错误消息，不明白为什么。

选择

SELECT proy_obs FROM proy WHERE proy_cod = 'C-12-001';
+-------------+
| proy_obs    |
+-------------+
|             |
+-------------+
1 row in set (0.00 sec)

更新

UPDATE proy SET proy_obs = 'Test' WHERE proy_cod = 'C-12-001';
ERROR 1172 (42000): Result consisted of more than one row

MySQL版本：

mysql  Ver 14.14 Distrib 5.1.71, for redhat-linux-gnu (x86_64) using readline 5.1

Answer 1

看起来您的桌面上定义了一个导致问题的触发器。

要查看它，请运行

select trigger_name 
  from information_schema.triggers 
 where trigger_schema = schema()
   and event_object_table = 'proy';