在插入Oracle後返回標識列的值

Question

如何在插入後返回Oracle 12c中標識列（id）的值？看起來像大多數方法使用序列來取回插入項目的ID。

Answer 1

只需使用RETURNING子句。

例如 -

RETURNING identity_id INTO variable_id; 

測試案例 -

SQL> set serveroutput on 
SQL> CREATE TABLE t 
    2 (ID NUMBER GENERATED ALWAYS AS IDENTITY, text VARCHAR2(50) 
    3 ); 

Table created. 

SQL> 
SQL> DECLARE 
    2 var_id NUMBER; 
    3 BEGIN 
    4 INSERT INTO t 
    5  (text 
    6  ) VALUES 
    7  ('test' 
    8  ) RETURNING ID INTO var_id; 
    9 DBMS_OUTPUT.PUT_LINE('ID returned is = '||var_id); 
10 END; 
11/
ID returned is = 1 

PL/SQL procedure successfully completed. 

SQL> 

SQL> select * from t; 

     ID TEXT 
---------- -------------------------------------------- 
     1 test 

SQL>