data(concat_string) = concat_lines_of( table = lt_table sep = ',' ).
DATA: t1 TYPE c LENGTH 10 VALUE 'We',
t2 TYPE c LENGTH 10 VALUE 'have',
t3 TYPE c LENGTH 10 VALUE 'all',
t4 TYPE c LENGTH 10 VALUE 'the',
t5 TYPE c LENGTH 10 VALUE 'time',
t6 TYPE c LENGTH 10 VALUE 'in',
t7 TYPE c LENGTH 10 VALUE 'the',
t8 TYPE c LENGTH 10 VALUE 'world'.
CONCATENATE t1 t2 t3 t4 t5 t6 t7 t8 INTO DATA(lv_result) SEPARATED BY space.
WRITE: lv_result.