MySQL中如何找到列名长度大于5的所有列？

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科威旅游管理系统

该软件是以php+MySQL进行开发的旅游管理网站系统。系统前端采用可视化布局，能自动适应不同尺寸屏幕，一起建站，不同设备使用，免去兼容性烦恼。系统提供列表、表格、地图三种列表显示方式，让用户以最快的速度找到所需行程，大幅提高效率。系统可设置推荐、优惠行程，可将相应行程高亮显示，对重点行程有效推广，可实现网站盈利。系统支持中文、英文，您还可以在后台添加新的语言，关键字单独列出，在后台即可快速翻译。

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+-------------------+-------------------------+
| TABLE_NAME        | COLUMN_NAME             |
+-------------------+-------------------------+
| DemoTable         | UserId                  |
| DemoTable         | EndDate                 |
| DemoTable         | StartDate               |
| DemoTable         | StudentFavouriteSubject |
| DemoTable         | StudentFirstName        |
| DemoTable         | StudentId               |
| DemoTable         | ShippingDate            |
| DemoTable         | Number                  |
| DemoTable         | Value1                  |
| DemoTable         | Value2                  |
| DemoTable         | ArrivalDate             |
| DemoTable         | ShippingDate            |
| DemoTable         | UserAge                 |
| DemoTable         | UserId                  |
| DemoTable         | UserName                |
| DemoTable         | CustomerId              |
| DemoTable         | CustomerValue           |
| DemoTable         | UserId                  |
| DemoTable         | UserMailId              |
| DemoTable         | FirstName               |
| DemoTable         | Number                  |
| DemoTable         | isMarried               |
| DemoTable         | Number                  |
| DemoTable         | FruitName               |
| DemoTable         | FruitPrice              |
| DemoTable         | CustomerAllProductPrice |
| DemoTable         | CustomerId              |
| DemoTable         | CustomerName            |
| DemoTable         | UserId                  |
| DemoTable         | UserScore               |
| DemoTable         | StudentAge              |
| DemoTable         | StudentCountryName      |
| DemoTable         | StudentFirstName        |
| DemoTable         | StudentId               |
| DemoTable         | StudentLastName         |
| DemoTable         | FirstName               |
| DemoTable         | Arrivaldatetime         |
| DemoTable         | Amount                  |
| DemoTable         | Number                  |
| DemoTable         | Number                  |
| DemoTable         | FirstName               |
| DemoTable         | CustomerId              |
| DemoTable         | CustomerPrice           |
| DemoTable         | CustomerProductName     |
| DemoTable         | CustomerProductQuantity |
| DemoTable         | Value1                  |
| DemoTable         | Value2                  |
| DemoTable         | FirstName               |
| DemoTable         | LastName                |
| DemoTable         | UserId                  |
| DemoTable         | MonthNumber             |
| DemoTable         | YearNumber              |
| insertcurrentdate | currentDate             |
| student           | first_name              |
| student           | last_name               |
+-------------------+-------------------------+
55 rows in set (0.01 sec)