I am using a macro in SAS to loop over the data tables in a specific library. I put the metadata information in a data null step and make a comparison with a where statement and my macro variable.

My SQL step looks like:

```
proc sql;
  select quote(trim(code)) into :procedures separated by ', ' from procedures;
quit;

```

Some values of `code` contain values like "45.10" and "G0102", so cannot be coerced to numeric. The macro contains the line:

```
%macro filter_codes(indata, outdata);
  data &outdata;
     set &indata(where = (code in (&procedures)));
  run;
%mend;

```

but the decimal values create an issue when double-quoted using the "quote" function.

Can I separate values with single quotes?

EDIT: The issue was caused by the fact that the filter\_codes macro was run within a call execute step (over a range of datasets) and double quotes resolved in macro variables inside of double quotes would end the call execute.