concatenate question?

existing data:

i_input_name( with only one field) contains 4 records

name1

name2

name3

name4

desired output should be a single line separated by ',' into another <b>itab2-result_line</b>

ie <b>itab2-result_line</b> = <b>name1,name2,name3,name4</b>

thanks,

subba