I am trying to perform a transpose from wide to long.  There are 27 variables that I am transposing.  The data looks essentially like this: id   var1   var2  var3 ... var27 1     a         b        c             In the past when I have done this transpose, the result looks like this: id  _name_  COL1 1      var1       a 1      var2       b 1      var3       c ... 1      var27   However, today the result I am getting looks like this: id  _name_  COL1  COL2  COL3  ... COL25 1      var1         a        a          a 1      var2         b        b          b          1      var3         c        c          c ... 1      var27   This is the code I used: proc transpose data = data out = data_long ; by id; var var1 - var27; run;   What am I doing wrong here?  Why and I getting so many columns? My variables are all consecutive in the data set and all are the same format- $8. Using SAS 9.4 on Windows     ... View more