Plsql 如何在游标循环中使用Trunc（mydate）

我是PL/SQL新手，今天正在研究cursor，在这个场景中，我需要根据日期+金额+客户id+txn\u tpye获取重复的事务类型。一旦我得到了副本，我就必须使用另一个游标或普通循环，使用select列values date+amount+cust_id+txn_tpye作为where子句

在此之前，当我试图打印mydate值getting error时，我只是尝试打印它们，以确定是否获取了值。请求你们的帮助

SET SERVEROUTPUT ON

declare 

CURSOR dup_check

IS 

SELECT cust_id,amount,trunc(mydate),transaction_type,COUNT(1)
 FROM table_X WHERE trunc(mydate)>='10-OCT-2015' 
GROUP BY cust_id,amount,trunc(mydate),transaction_type
HAVING COUNT(1)>1 ;

BEGIN

FOR UP_REC IN dup_check

LOOP 

DBMS_OUTPUT.put_line(UP_REC.cust_id||'  '||UP_REC.amount||UP_REC.trnasaction_type||**trunc(mydate))**;

END LOOP;

END;


**PLS-00302: component 'mydate' must be declared**

---

为truncmydate字段添加别名，如下所示，并将UP_REC.mydate放入dbms_输出中

SET SERVEROUTPUT ON
declare
CURSOR dup_check
IS
SELECT cust_id,
       amount,
       trunc(mydate) mydate, /* add an alias here */
       transaction_type,
       COUNT(1) 
 FROM table_X WHERE trunc(mydate) >= '10-OCT-2015' 
 GROUP BY cust_id,amount,trunc(mydate),transaction_type HAVING COUNT(1)>1 ;

BEGIN

FOR UP_REC IN dup_check
LOOP
DBMS_OUTPUT.put_line(UP_REC.cust_id||' '||UP_REC.amount||UP_REC.trnasaction_type||UP_REC.mydate));
END LOOP;

END;

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你好，纳伦德拉，谢谢你提供的信息。伟大的成功了。简单的事情使生活更容易。