有编译器问题以及游标问题的声明？

【问题标题】：Having a complier issue as well as declaration of Cursor issue?有编译器问题以及游标问题的声明？
【发布时间】：2021-12-21 18:36:07
【问题描述】：

所以我正在为我的项目创建一个程序。它说游标的声明不完整，导致语句被忽略。由于我的 T_ROW 无效，然后它最终给了我一个编译器日志问题。我对 SQL Oracle 数据库相当陌生，我正在尝试修复它。

这是我的代码：

CREATE OR REPLACE PROCEDURE T(Trip_ID in NUMBER) IS
CURSOR Trips_CURSOR IS SELECT * FROM TRIPS
where TRIPS_ID = T_INFO;
T_ROW Trips_CURSOR%ROWTYPE;
BEGIN
 DBMS_OUTPUT.PUT_LINE('The ID of this trip is ' || T_INFO);
 FOR T_ROW IN Trips_CURSOR LOOP
 DBMS_OUTPUT.PUT_LINE('The Date of the trip is ' || T_ROW.DATE_OF_TRIP);
 DBMS_OUTPUT.PUT_LINE('The Destination town of the Trip ' || T_ROW.Destination_Town);
 DBMS_OUTPUT.PUT_LINE('The Source town is  ' || T_ROW.Source_Town);

END LOOP;
END;

这也是我的代码截图： Image of Error

【问题讨论】：

标签： sql oracle database-cursor

【解决方案1】：

查看您的屏幕截图，您的TRIPS 表包含TRIPS_ID、DATE_OF_TRIP、DESTINATION_TOWN 和SOURCE_TOWN 列。但是，您没有 T_INFO 列，并且您的参数未称为 T_INFO，因此您可能给参数提供了错误的名称：

CREATE OR REPLACE PROCEDURE T(
  T_INFO in TRIPS.TRIPS_ID%TYPE
)
IS
  CURSOR Trips_CURSOR IS
   SELECT *
   FROM   TRIPS
   WHERE  TRIPS_ID = T_INFO;

  T_ROW Trips_CURSOR%ROWTYPE;
BEGIN
 DBMS_OUTPUT.PUT_LINE('The ID of this trip is ' || T_INFO);
 FOR T_ROW IN Trips_CURSOR LOOP
   DBMS_OUTPUT.PUT_LINE('The Date of the trip is ' || T_ROW.DATE_OF_TRIP);
   DBMS_OUTPUT.PUT_LINE('The Destination town of the Trip ' || T_ROW.Destination_Town);
   DBMS_OUTPUT.PUT_LINE('The Source town is  ' || T_ROW.Source_Town);
  END LOOP;
END;
/

db小提琴here

【讨论】：