ABAP : type of wa table

TABLES zpat_student.
*---------------------TYPE 1 --------------------------
SELECT name score grade into (zpat_student-name,zpat_student-score,zpat_student-grade)
  from zpat_student.
  write : / zpat_student-name, zpat_student-score , zpat_student-grade.
  ENDSELECT.
*---------------------TYPE 2 -------------------------

SELECT *
  from zpat_student.
  write : / zpat_student-name, zpat_student-score, zpat_student-grade.
  ENDSELECT.
*---------------------TYPE 3 ------------------------

DATA :BEGIN OF wa,
  name type zpat_student-name,
  score type zpat_student-score,
  grade type zpat_student-grade,
  END OF wa.
select name score grade into wa
  from zpat_student.
  write : / wa-name , wa-score , wa-grade.
  ENDSELECT.