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How to split records in .dat file in SAS?

Posted on 2013-02-04
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Last Modified: 2013-02-06
How may I split records when records are used from .dat file in SAS?

I have allrecords.dat file and I am trying to split this file into two separate files (records1.dat and records2.dat) with the following criteria:

write records with variable Var1(1:1)=1 to records1.dat (if first number in Var1 is 1 then this record should go to records1.dat)
write records with variable Var1(1:2)=2 to records2.dat (if first number in Var1 is 2 then this record should go to records2.dat)

Note: allrecords.dat file has about 20 different variables but I only would like to use Var1 for splitting purposes. I still need to keep all other variables with all data.

I have started with the below code:
data data1 data2;
  infile "allrecords";
   input @1 Var1 $char20. @22 Var2;
    if Var1='1*' then data1;
    if Var1='2*' then data2;
run;
  
data _null_;
   set data1;
     file records1;
       put @1   Var1 $char20.
             @22 Var2 $char.;
run;

data _null_;
   set data2; 
     file records2;
       put @1   Var1 $char20.
             @22 Var2 $char.;
run;

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Any examples, comments or suggestions would be greatly appreciated!
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Question by:labradorchik
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6 Comments
 
LVL 11

Expert Comment

by:theartfuldazzler
ID: 38854652
Hi

Use the OUTPUT statement:

data data1 data2;
  infile "allrecords";
   input @1 Var1 $char20. @22 Var2;
    if substr(Var1,1,1)='1' then OUTPUT data1;
    if Substr(Var1,1,1)='2' then OUTPUT data2;
run;
0
 

Author Comment

by:labradorchik
ID: 38855067
Thank you very much theartfuldazzler!

Should I still use the code below to put all data from data1 and data2 datasets to records1.dat and records2.dat? Is this the most efficient way?

data _null_;
   set data1;
     file records1;
       put @1   Var1 $char20.
             @22 Var2 $char.;
run;

data _null_;
   set data2; 
     file records2;
       put @1   Var1 $char20.
             @22 Var2 $char.;
run;

Open in new window

0
 
LVL 11

Expert Comment

by:theartfuldazzler
ID: 38855133
Hi

you can do it in one step:


DATA _NULL_;
  infile "allrecords";
   input @1 Var1 $char20. @22 Var2;

  IF SUBSTR(Var1,1,1) = '1'  then File "h:\xxx\test1.txt";
   else IF SUBSTR(Var1,1,1) = '2' THEN File "h:\xxx\test2.txt";

   PUT _ALL_;
RUN;
0
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LVL 11

Accepted Solution

by:
theartfuldazzler earned 500 total points
ID: 38855142
Hi

Even better - if you just want to copy the one line exactly from the one .dat to another:

DATA _NULL_;
  infile "allrecords";
   input ;

  IF SUBSTR(Var1,1,1) = '1'  then File "h:\xxx\test1.txt";
   else IF SUBSTR(Var1,1,1) = '2' THEN File "h:\xxx\test2.txt";

   PUT _INFILE_;
RUN;

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0
 

Author Comment

by:labradorchik
ID: 38855290
Great!! I will test it and let you know how it turned out.
Thank you, theartfuldazzler!
0
 

Author Comment

by:labradorchik
ID: 38860124
theartfuldazzler, your second example worked fine.
This is exactly what I needed!
Thank you very much for your comments and suggestions!!
0

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