Dynamic call FOR ALL ENTRIES

How to dynamically call FOR ALL ENTRIES

DATA: lt_table TYPE STANDARD TABLE OF fieldname.

CONCATENATE lv_key_field ‘= lt_table-table_line’
  INTO lv_where SEPARATED BY space.
  APPEND lv_where TO lt_where.

SELECT fieldname
  FROM (lv_table)
  INTO TABLE lt_output
  FOR ALL ENTRIES IN lt_table
  WHERE (lt_where).