我有一個名爲bbs的數據庫,它有37個表。 我想查找這些表中列名長度大於5的所有列!如何查找列名長度大於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)
如何編寫SQL?
請嘗試我的解決方案。希望這是你正在尋找的。 – 2012-02-12 16:20:40
+1 for rails :) – 2012-02-12 17:00:28
是的,它的一個rails bbs應用程序!我想添加前綴到一些列,但我應該檢查哪種方式是最好的?更改數據庫或更改我的代碼。感謝您的回覆^ _ ^ – Neo 2012-02-12 17:38:08