proc sql noprint;

 select distinct cats(‘&streamDelim newline;<input type="checkbox" name="product" value="’,strip(product),’">’

                      ,strip(product)

                     )

 into:checkBoxes separated by ‘<br>’

 from sashelp.shoes;

 quit;

)));

&checkboxes

Use DOSUBL to execute SQL code to select the distinct products and create a macro variable containing the HTML markup text to create a check box for each product. Note the use of the NEWLINE facility (available starting with SAS 9.3 TS1M3) that forces a line feed, thus preventing a line feed inside a tag and also making the HTML more readable. The set of check box tags is generated by the macro variable reference, &checkboxes.