如下B变量是不是你所求：
DATA A;
INPUT A;
B=COMPRESS('MK_'||PUT(A,Z9.));
CARDS;
20
1750
1800
1853
1923
1961
2034
2098
2135
2178
;
RUN;

PROC PRINT;
RUN;

我用的SAS版本不对？

548  data match;set match;cik=COMPRESS('MK_'||PUT(company_fkey,Z9.));run;
                                                                ---
                                                                48

ERROR 48-59: The format $Z was not found or could not be loaded.

NOTE: The SAS System stopped processing this step because of errors.
WARNING: The data set WORK.MATCH may be incomplete.  When this step was stopped there were 0
         observations and 2 variables.
WARNING: Data set WORK.MATCH was not replaced because this step was stopped.
NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds

搞定了，谢谢！ 原来是格式不对：）

ok,那便好。