我有一个名为bbs的数据库,它有37个表。 我想查找这些表中列名长度大于5的所有列!如何查找列名长度大于5的所有列?
mysql> show tables;
+---------------------+
| Tables_in_rails_bb |
+---------------------+
| articles |
| articles_categories |
| bookmarks |
| categories |
| comments |
| drafts |
| extension_groups |
| extensions |
| forum_tracks |
| forums |
| icon_items |
| icons |
| levels |
| management_groups |
| management_logs |
| message_folders |
| message_tos |
| messages |
| moderators |
| posts |
| replies |
| reports |
| roles |
| roles_users |
| schema_migrations |
| sessions |
| smiles |
| subscribes |
| system_configs |
| topic_tracks |
| topics |
| upload_files |
| users |
| users_forums |
| users_topics |
| warnings |
| word_replacements |
+---------------------+
37 rows in set (0.25 sec)
如何编写SQL?
请尝试我的解决方案。希望这是你正在寻找的。 – 2012-02-12 16:20:40
+1 for rails :) – 2012-02-12 17:00:28
是的,它的一个rails bbs应用程序!我想添加前缀到一些列,但我应该检查哪种方式是最好的?更改数据库或更改我的代码。感谢您的回复^ _ ^ – Neo 2012-02-12 17:38:08