直接路徑INSERT查詢產生ORA-00918錯誤

-1

能否請您解釋一下爲什麼ORA-00918，而在行執行這個查詢直接路徑INSERT查詢產生ORA-00918錯誤

INSERT INTO CLG_TEST_2 (CLG_TEST_2.record_id, CLG_TEST_2.chain_id, 

CLG_TEST_2.chain_n, 
CLG_TEST_2.contact_info) 

select * from (

SELECT 1, 1, 0, '2222' from dual UNION ALL 

SELECT 2, 2, 0, '4444' from dual UNION ALL 

SELECT 3, 3, 0, '6666' from dual 

)

錯誤產生的誤差1 ORA-00918：列定義的含糊

腳本終止於第2行。

來源

2017-05-24 C2S

問題在於，您在查詢上使用select *而沒有給列賦予別名;這將工作：

INSERT INTO CLG_TEST_2 (CLG_TEST_2.record_id, 
         CLG_TEST_2.chain_id, 
         CLG_TEST_2.chain_n, 
         CLG_TEST_2.contact_info) 
select * 
from (
     SELECT 1 a, 1 b, 0 c, '2222' d from dual UNION ALL 
     SELECT 2 , 2 , 0 , '4444' from dual UNION ALL 
     SELECT 3 , 3 , 0 , '6666' from dual 
    )

但是，您可以簡化代碼：

INSERT INTO CLG_TEST_2 (record_id, chain_id, chain_n, contact_info) 
    SELECT 1, 1, 0, '2222' from dual UNION ALL 
    SELECT 2, 2, 0, '4444' from dual UNION ALL 
    SELECT 3, 3, 0, '6666' from dual

更多的東西有關錯誤的原因。

您的代碼：

SQL> INSERT INTO CLG_TEST_2 (
    2  CLG_TEST_2.record_id, 
    3  CLG_TEST_2.chain_id, 
    4  CLG_TEST_2.chain_n, 
    5  CLG_TEST_2.contact_info) 
    6 select * from (
    7  SELECT 1, 1, 0, '2222' from dual UNION ALL 
    8  SELECT 2, 2, 0, '4444' from dual UNION ALL 
    9  SELECT 3, 3, 0, '6666' from dual 
10 ); 
select * from (
     * 
ERROR at line 6: 
ORA-00918: column ambiguously defined

稍有不同：

SQL> INSERT INTO CLG_TEST_2 (
    2  CLG_TEST_2.record_id, 
    3  CLG_TEST_2.chain_id, 
    4  CLG_TEST_2.chain_n, 
    5  CLG_TEST_2.contact_info) 
    6 select * from (
    7  SELECT 1, 2, 0, '2222' from dual UNION ALL 
    8  SELECT 2, 2, 0, '4444' from dual UNION ALL 
    9  SELECT 3, 3, 0, '6666' from dual 
10 ); 

3 rows created.

有什麼不同？

在第一行，我改變

SELECT 1, 1, 0, '2222' --> SELECT 1, 2, 0, '2222' 
     ^      ^

原因：

SQL> SELECT 1, 2, 0, '2222' from dual UNION ALL 
    2 SELECT 2, 2, 0, '4444' from dual UNION ALL 
    3 SELECT 3, 3, 0, '6666' from dual; 

     1   2   0 '222 
---------- ---------- ---------- ---- 
     1   2   0 2222 
     2   2   0 4444 
     3   3   0 6666 

SQL> SELECT 1, 1, 0, '2222' from dual UNION ALL 
    2 SELECT 2, 2, 0, '4444' from dual UNION ALL 
    3 SELECT 3, 3, 0, '6666' from dual; 

     1   1   0 '222 
---------- ---------- ---------- ---- 
     1   1   0 2222 
     2   2   0 4444 
     3   3   0 6666 

SQL>

在這裏，你有相同的別名'1'兩列，這是混淆了外部select *。

此外，direct-path insert是不同的東西

來源

2017-05-24 14:08:58 Aleksej

我沒有看到任何「Direct-Path」插入。無論如何，嘗試這一個

INSERT INTO CLG_TEST_2 (CLG_TEST_2.record_id, CLG_TEST_2.chain_id,  
    CLG_TEST_2.chain_n, 
    CLG_TEST_2.contact_info)  
SELECT 1, 1, 0, '2222' from dual UNION ALL 
SELECT 2, 2, 0, '4444' from dual UNION ALL 
SELECT 3, 3, 0, '6666' from dual

btw，你爲什麼從數字使用字符串？

來源

2017-05-24 14:08:33

直接路徑INSERT查詢產生ORA-00918錯誤

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