ORA-00979:bukan ekspresi GROUP BY ketika saya menjalankan sql saya

Masalahnya adalah Anda memesan berdasarkan sesuatu yang tidak ada dalam group by klausa.

Misalnya, ini berfungsi

SQL> with testGroup as ( select 1 as one, 2 as two from dual)
  2  select one
  3  from testGroup
  4  group by one;

       ONE
----------
         1

Jika Anda order by kolom yang tidak ada dalam group by klausa:

SQL> with testGroup as ( select 1 as one, 2 as two from dual)
  2  select one
  3  from testGroup
  4  group by two;
select one
       *
ERROR at line 2:
ORA-00979: not a GROUP BY expression

Jika Anda mengedit group by klausa untuk menangani kolom yang Anda butuhkan dalam order by :

SQL> with testGroup as ( select 1 as one, 2 as two from dual)
  2  select one
  3  from testGroup
  4  group by one, two;

       ONE
----------
         1

SQL>