公用表表達式

Oracle 12 c 中是否有替代公用表表達式的方法？我一直在使用 SQL Server 的語法，而 oracle 給了我以下錯誤。

SELECT CTE_TEST AS (SELECT DISTINCT deptno, ename
       FROM   Test_Table  )
SELECT * FROM CTE;

命令行錯誤：43 列：20 錯誤報告 - SQL 錯誤：ORA-00923：FROM 關鍵字未在預期的位置找到 00923。00000 -“FROM 關鍵字未在預期的位置找到” *原因：

*操作：

SQL> with cte_test
     2  as
     3  (select * from emp);
   (select * from emp)
                     *
   ERROR at line 3:
   ORA-00928: missing SELECT keyword


   SQL> select cte_test as (select * from emp)
     2  select * from cte;
   select cte_test as (select * from emp)
                      *
   ERROR at line 1:
   ORA-00923: FROM keyword not found where expected


   SQL> with cte_test as (select * from emp)
     2  select * from cte_test;

        EMPNO ENAME      JOB              MGR HIREDATE                   SAL       COMM     DEPTNO
   ---------- ---------- --------- ---------- ------------------- ---------- ---------- ----------
         7369 SMITH      CLERK           7902 1980-12-17 00:00:00        800                    20
         7499 ALLEN      SALESMAN        7698 1981-02-20 00:00:00       1600        300         30
         7521 WARD       SALESMAN        7698 1981-02-22 00:00:00       1250        500         30
         7566 JONES      MANAGER         7839 1981-04-02 00:00:00       2975                    20
         7654 MARTIN     SALESMAN        7698 1981-09-28 00:00:00       1250       1400         30
         7698 BLAKE      MANAGER         7839 1981-05-01 00:00:00       2850                    30
         7782 CLARK      MANAGER         7839 1981-06-09 00:00:00       2450                    10
         7839 KING       PRESIDENT            1981-11-17 00:00:00       5000                    10
         7844 TURNER     SALESMAN        7698 1981-09-08 00:00:00       1500          0         30
         7900 JAMES      CLERK           7698 1981-12-03 00:00:00        950                    30
         7902 FORD       ANALYST         7566 1981-12-03 00:00:00       3000                    20
         7934 MILLER     CLERK           7782 1982-01-23 00:00:00       1300                    10

   12 rows selected.

   SQL>

引用自：https://dba.stackexchange.com/questions/257558