Merge data with a variable of different length

[caveman529]

Hi, everyone: 

I hope to merge 10 datasets into one by using the following:

data want;

     set x1 - x10;

run;

But SAS reports that "Multiple lengths were specified for the variable case_no by input  data set(s). This may cause truncation of data."  Could you please tell me how to specify the length in for want dataset so that when I combine small datasets x1 - x10, there is no truncation? 

Thank you!

[LinusH]

First figure out how long case_no is when it's "longest". Then insert a length or an attrib statement prior to the set.

[caveman529]

Thank you for your help.  It works

[PGStats · Accepted solution]

Simply state a length for case_no that is as large as the largest one :

data want;

length case_no $30;

set x1-x10;

run;

PG