存储过程错误（列定义不明确）答案

【问题标题】：Stored Procedure Error (column ambiguously defined)存储过程错误（列定义不明确）
【发布时间】：2020-10-12 17:01:17
【问题描述】：

获取此行的以下错误创建一个存储过程，将其作为参数作为行业 ID

 CREATE OR REPLACE PROCEDURE businesses (industryid INDUSTRY.INDUSTRYID%TYPE) AS
    
CURSOR businessloop IS
select tx.UNIONTITLE,b.ABNNUMBER,b.BUSINESSNAME
from business b INNER JOIN business_industry bi
on
b.ABNNUMBER = bi.ABNNUMBER
INNER JOIN industry ind
on
bi.INDUSTRYID = ind.INDUSTRYID
INNER JOIN trade_union tx
on 
ind.UNIONID = tx.UNIONID
where 
INDUSTRY.INDUSTRYID = industryid;

BEGIN

FOR ptr IN businessloop LOOP
DBMS_OUTPUT.PUT_LINE(ptr.UNIONTITLE);
DBMS_OUTPUT.PUT_LINE(ptr.ABNNUMBER);
DBMS_OUTPUT.PUT_LINE(ptr.BUSINESSNAME);
DBMS_OUTPUT.PUT_LINE('---------------------------');
END LOOP;

end businesses;
/
Execute businesses(6);

我的输出是这样的

Errors: PROCEDURE BUSINESSES
Line/Col: 5/1 PL/SQL: SQL Statement ignored
Line/Col: 16/23 PL/SQL: ORA-00918: column ambiguously defined
Line/Col: 26/1 PL/SQL: Statement ignored
Line/Col: 26/22 PLS-00364: loop index variable 'PTR' use is invalid
Line/Col: 27/1 PL/SQL: Statement ignored
Line/Col: 27/22 PLS-00364: loop index variable 'PTR' use is invalid
Line/Col: 28/1 PL/SQL: Statement ignored
Line/Col: 28/22 PLS-00364: loop index variable 'PTR' use is invalid

ORA-06550: line 1, column 7:
PLS-00905: object SQL_PQETEGYQDKCHNVXHUMIWRPLSE.BUSINESSES is invalid

我认为这行会出错

INDUSTRY.INDUSTRYID = industryid;

【问题讨论】：

我认为这条线有错误你可能是对的。重命名过程参数，消除名称干扰。
谢谢，这就是原因，@Akina

标签： oracle join stored-procedures plsql

【解决方案1】：

在 cmets 中回答：

我认为这行会出错你可能是对的。重命名程序的参数，消除名称干扰。 – Akina 2 小时前

谢谢，这就是原因，@Akina – sandun wijerathne Jerry 2 小时前

【讨论】：

【解决方案2】：

回答

 CREATE OR REPLACE PROCEDURE businesses (industryidx INDUSTRY.INDUSTRYID%TYPE) AS
    
CURSOR businessloop IS
select tx.UNIONTITLE,b.ABNNUMBER,b.BUSINESSNAME
from business b INNER JOIN business_industry bi
on
b.ABNNUMBER = bi.ABNNUMBER
INNER JOIN industry ind
on
bi.INDUSTRYID = ind.INDUSTRYID
INNER JOIN trade_union tx
on 
ind.UNIONID = tx.UNIONID
where 
ind.INDUSTRYID = industryidx;

BEGIN

FOR ptr IN businessloop LOOP
DBMS_OUTPUT.PUT_LINE(ptr.UNIONTITLE);
DBMS_OUTPUT.PUT_LINE(ptr.ABNNUMBER);
DBMS_OUTPUT.PUT_LINE(ptr.BUSINESSNAME);
DBMS_OUTPUT.PUT_LINE('---------------------------');
END LOOP;

end businesses;
/
Execute businesses(6);

【讨论】：