刪除不重複的重複項

我想清除「重複項」（來自cmemails.csubject），即使它們在文件命名上不相同。以下是相同的文件（文件名除外）。我如何擺脫所有重複記錄？我無法弄清楚如何比較這些電子郵件，更不用說刪除重複。刪除不重複的重複項

***ORIGINAL*** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT.MSG 
**DUPLICATE ** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT - 1.MSG 
**DUPLICATE ** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT - 99.MSG 
**DUPLICATE ** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT - 401.MS

來源

2013-10-16 Zornjac

根據您所提供的，你可以嘗試這樣的事情的信息（第一瀏覽顯示四條記錄，第二個瀏覽顯示只有原來的）。下面的例子可以在命令窗口中運行使用DELETE命令顯示幾個樣本：

Set Deleted On 
Create Cursor test (nrec i, cfile c(150)) 
Insert Into test Values (1,"***ORIGINAL*** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT.MSG") 
Insert Into test Values (2,"**DUPLICATE ** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT - 1.MSG") 
Insert Into test Values (3,"**DUPLICATE ** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT - 99.MSG") 
Insert Into test Values (4,"**DUPLICATE ** 2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991 -21 OCT 2013 07-00 GMT - 401.MS") 
Browse Last 
Delete For Left(cfile,14)="**DUPLICATE **" 
Browse Last 
Recall All 
Browse Last 
Delete For "2013-10-07 - [email protected] - MS DEMAND MAINTENANCE NOTIFICATION - TN049991" $ cfile And Left(cfile,14)<>"***ORIGINAL***" 
Browse Last

來源

2013-10-17 11:18:10

刪除不重複的重複項

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