Hi @JohnChen_TW; You can use this line : compressed = compress(original,'<='); this will remove <= combination from the variaable; But, on the third line you provided another special character in sample data, so below code will not compress this special character; so in this case you can use this code: data test;
set test;
compressed=compress(original,'<');
compressed=compress(original,'=');
compressed=compress(original,'>');
run; it will remove all the possible combination like: <=, <, =, >, => from the variable
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