如何在 MVC3.0 中使用 MySQL C# 每次比较当前记录与同一表中的先前记录。
这是我的桌子
历史表:
id | projid| task | name | description | date | type
----|-------| ----- | -------------- |------------ | -------| ---------
1 | 1 | sys21 | validation | validating user | 1-5-12 | created
2 | 1 | sys21 | bug tracking | background bug | 23-7-12 | updated
| | | | tracking | |
3 | 1 | sys21 | bug tracking | bug reporting | 30-8-12 | updated
4 | 1 | sys21 | bugs | bug reporting | 12-9-12 | updated
----------------------------------------------------------------------------------
现在我想要结果,以便将更新类型的记录与以前的记录进行比较,以便将以前的记录显示为以前的历史记录和通过与以前的记录进行比较获得的记录,并仅将更新的字段显示为当前历史记录。
现在取决于 projid 检索历史。
我的观点如下所示:
previous history current history
---------------- ---------------
type: created
name: validation
description: validating user
--------------------------------------------------------------
type: created updated
name validation bug tracking
description: validating user background bug tracking
--------------------------------------------------------------------
type: updated updated
name: bug tracking bug report
description: background bug tracking bug reporting
----------------------------------------------------------------
type: updated updated
name: bug tracking -
Description: background bug tracking bug reporting
------------------------------------------------------------------------
type: updated updated
name: bug tracking bugs
Description: bug reporting -
我期待上述输出,任何人请帮助我摆脱这种情况,任何国王都将被接受......
谢谢,