Question

create or replace
PROCEDURE PROCEDURE1
AS
  MYCOLUMNVAR  VARCHAR2(50);

BEGIN
SELECT <<some query>> INTO MYCOLUMNVAR FROM DUAL;    --this query contains 
                                                     -- a regular expression 
                                                     -- and some other criteria 
                                                     -- to store a column
                                                     -- name into MYCOLUMNVAR


INSERT INTO TABLE_TMP(ID,COLUMN1)
       (SELECT a.ID,b.MYCOLUMNVAR FROM TAB1 a, TAB2 b WHERE...)

上述查询中分配给MYCOLUMNVAR的值为DATA。我在表DATA中有一个列名TAB2。在尝试运行我正在进行的程序时

Error(50,3): PL/SQL: ORA-00904: "B"."MYCOLUMNVAR": invalid identifier.

Answer 1

您需要dynamic query才能解决此类问题：

EXECUTE IMMEDIATE 'INSERT INTO TABLE_TMP(ID,COLUMN1)
            (SELECT a.ID,b.' || MYCOLUMNVAR || ' FROM TAB1 a, TAB2 b WHERE...)'

如何访问名称存储在变量中的列？

1 个答案: