Question

我有以下步骤，应该删除特定的客户。我不断收到错误，我不确定为什么。我是新来的，这是课堂作业。

在此先感谢您的帮助：

CREATE or REPLACE PROCEDURE DISP_CUST_DELETE (I_CUSTOMER_NUM IN CUSTOMER_NUM&TYPE)

BEGIN 
    DELETE
    FROM  CUSTOMER
    WHERE CUSTOMER_NUM = I_CUSTOMER_NUM;

    dbms_output.put_line('Customer has been deleted');

EXCEPTION
    WHEN NO_DATA_FOUND THEN
        dbms_output.put_line('NO CUSTOMER WITH this number has been deleted');
END;
/

这里有一些更新。
是的，对不起，这就是我的意思。这是更新的过程。

CREATE or REPLACE PROCEDURE DISP_CUST_DELETE (I_CUSTOMER_NUM IN CUSTOMER.CUSTOMER_NUM) AS

BEGIN 
    DELETE
    FROM CUSTOMER
    WHERE CUSTOMER_NUM = I_CUSTOMER_NUM;

    dbms_output.put_line('Customer' || I_CUSTOMER_NUM ||'has been deleted');

EXCEPTION
    WHEN NO_DATA_FOUND THEN
        dbms_output.put_line('NO CUSTOMER WITH'||I_CUSTOMER_NUM||'has been deleted');
END;
/

这是我得到的错误：

0/0 PL / SQL：编译单元分析已终止1/47
PLS-00488：“ CUSTOMER.CUSTOMER_NUM”必须为类型

Answer 1

就像注释中建议的@sticky bit一样，您的代码有语法错误。为了使您将变量声明为与先前声明的变量或表的列相同的类型，应使用table.table_column%TYPE。

CREATE or REPLACE PROCEDURE DISP_CUST_DELETE (
    I_CUSTOMER_NUM IN CUSTOMER.CUSTOMER_NUM%TYPE   --> This line here
) AS

BEGIN 
    DELETE
    FROM CUSTOMER
    WHERE CUSTOMER_NUM = I_CUSTOMER_NUM;

    dbms_output.put_line('Customer' || I_CUSTOMER_NUM ||'has been deleted');

    EXCEPTION
        WHEN NO_DATA_FOUND THEN
            dbms_output.put_line('NO CUSTOMER WITH'||I_CUSTOMER_NUM||'has been deleted');
END;
/

删除客户的步骤

1 个答案: