datetime - SAS：数据集名称删除日期并替换为当前日期

Question

我目前有一个宏，可以将我的数据集从一个分支移动到另一个分支。在每个动作中，日期都会更新。但是，在输入新日期之前我无法自动删除旧日期，有什么建议吗？

代码是：

%Macro Merge_Branch(Branch = , Filename = , Library = );

    %Let Timestamp = %sysfunc(putn(%sysfunc(date()),yymmddn8.));

    %if &Branch. = Latest_Commit %then %do;

        Data LC._&Timestamp._&Filename.;
        set &Library..&Filename.;
        run;

    %end;

    %else %if &Branch. = Staging %then %do;

        %Let Filename = _20180909_Financial_Input;
        %Let Filename_temp = %scan(&Filename.,2,'_');
                %Let Date_String = %scan(&Filename.,1,'_');
                /* this is the section where I get stuck the dash is a subtraction i.e. I want to remove the date and just have the string*/
        %Let Filename_Stg = &Filename_temp - &Date_String;

        Data Stg._&Timestamp._&Filename_Stg.;
        set LC.&Filename.;
        run;

    %end;

%mend;

Input data can be made like this

data LC._20180909_Financial_Input;
var var1;
datalines;
1
1
1
1
;
run;

%Macro Merge_Branch(Branch = Staging , Filename = Financial_Input, Library = LC );

/*Note, in this macro the library is not important because it will always move from LC to STG*/

Answer 1

您的新文件名正在解决此问题。

Data Stg._20181009_Financial - 20180909;

那不是 SASNAME。