如何显示刚刚发生的MySQL警告？

要显示 MySQL 警告，您可以使用以下语法 -

SHOW WARNINGS;

以上语法仅显示 MySQL 提示符中的即时警告。假设您在它们之间运行另一个查询或者您丢失了 MySQL 连接，则 SHOW WARNINGS 将不起作用。

这是显示警告的查询 -

mysql> SHOW WARNINGS;

这是显示立即警告的输出 -

+-------+------+---------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Level | Code | Message                                                                                                                                                       |
+-------+------+---------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Error | 1064 | You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'QUERY CACHE' at line 1 |
+-------+------+---------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)