Question

我有一个正在尝试编写的存储过程，我想使用游标作为工作表，以便可以使用结果来更新表。它引发了一些错误。谁能帮助我解决这些问题？

create or replace PROCEDURE SP_POPULATE_STUDENT_STOPTEMPID

AS

CURSOR c_workTable IS
SELECT  
    stdnt.STUDENT_ID, 
    stdnt.route_code, 
    stdnt.DISPATCH_TYPE, 
    stdnt.RUN_CODE, 
    stdnt.STOP_ADDRESS, 
    stdnt.STOP_TIME, 
    ST.STOP_TEMPLATE_ID 
FROM  
    STOP_TEMPLATE ST 
    JOIN TASK_TEMPLATE TT 
        ON ST.TASK_TEMPLATE_ID = TT.TASK_TEMPLATE_ID 
    JOIN RUN_TEMPLATE RT 
        ON ST.RUN_TEMPLATE_ID = RT.RUN_TEMPLATE_ID,  
    STUDENT stdnt
WHERE 
    TT.TASK_NAME = stdnt.route_code 
    AND TT.DISPATCH_TYPE = stdnt.DISPATCH_TYPE 
    AND RT.RUN_CODE = stdnt.RUN_CODE 
    AND ST.STOP_DESCRIPTION = stdnt.STOP_ADDRESS 
    AND CAST(ST.EXPECTED_ARRIVAL_TIME AS TIME(7)) = stdnt.STOP_TIME ;

BEGIN

UPDATE STUDENT stdnt  
SET stdnt.STOP_TEMPLATE_ID = c_workTable .STOP_TEMPLATE_ID 
FROM  
    c_workTable 
WHERE  
    stdnt.STUDENT_ID = c_workTable .STUDENT_ID 
    AND stdnt.route_code = c_workTable .route_code 
    AND stdnt.DISPATCH_TYPE = c_workTable .DISPATCH_TYPE 
    AND stdnt.RUN_CODE = c_workTable .RUN_CODE 
    AND stdnt.STOP_ADDRESS = c_workTable .STOP_ADDRESS     
    AND stdnt.STOP_TIME = c_workTable .STOP_TIME 


END SP_POPULATE_STUDENT_STOPTEMPID;

ETA：更改了查询中的某些变量名

我已经基于sql server存储过程编写了此代码，但在update语句中却遇到了一些错误。

关于UPDATE STUDENT stdnt

错误（30,5）：PL / SQL：SQL语句已忽略

然后在from子句中出现此错误

错误（32,5）：PL / SQL：ORA-00933：SQL命令未正确结束

最后在END子句上

错误（42,35）：PLS-00103：遇到符号“文件结尾”   预期以下情况之一：（开始情况声明结束异常   如果循环模式为null，则退出goto，返回编译更新   在
   <<继续关闭当前删除删除锁
  插入打开回滚保存点集sql执行落实所有合并   管道吹扫

--new code
UPDATE(
SELECT stdnt.STOP_TEMPLATE_ID as old_val,
ST.STOP_TEMPLATE_ID as new_val
FROM STUDENT stdnt
    JOIN STOP_TEMPLATE ST 
    JOIN TASK_TEMPLATE TT 
        ON ST.TASK_TEMPLATE_ID = TT.TASK_TEMPLATE_ID 
    JOIN RUN_TEMPLATE RT 
        ON ST.RUN_TEMPLATE_ID = RT.RUN_TEMPLATE_ID
    JOIN STUDENT stdnt
        ON (TT.TASK_NAME = stdnt.route_code 
            AND TT.DISPATCH_TYPE = stdnt.DISPATCH_TYPE 
            AND RT.RUN_CODE = stdnt.RUN_CODE 
            AND ST.STOP_DESCRIPTION = stdnt.STOP_ADDRESS 
            AND CAST(ST.EXPECTED_ARRIVAL_TIME AS TIMESTAMP(7)) = 
stdnt.STOP_TIME)
) t
SET t.old_val = t.new_val;

Answer 1

另一种更好的方法是使用ORACLE中的MERGE语句从2个或更多表中更新表-

MERGE INTO STUDENT stdnt
USING (SELECT  SRM.STUDENT_ID, 
               SRM.route_code, 
               SRM.DISPATCH_TYPE, 
               SRM.RUN_CODE, 
               SRM.STOP_ADDRESS, 
               SRM.STOP_TIME, 
               ST.STOP_TEMPLATE_ID 
       FROM STOP_TEMPLATE ST 
       JOIN TASK_TEMPLATE TT ON ST.TASK_TEMPLATE_ID = TT.TASK_TEMPLATE_ID 
       JOIN RUN_TEMPLATE RT ON ST.RUN_TEMPLATE_ID = RT.RUN_TEMPLATE_ID,  
       STUDENT_ROUTE_MAPPING SRM 
       WHERE TT.TASK_NAME = SRM.route_code 
       AND TT.DISPATCH_TYPE = SRM.DISPATCH_TYPE 
       AND RT.RUN_CODE = SRM.RUN_CODE 
       AND ST.STOP_DESCRIPTION = SRM.STOP_ADDRESS 
       AND CAST(ST.EXPECTED_ARRIVAL_TIME AS TIME(7)) = SRM.STOP_TIME) I
ON (stdnt.STUDENT_ID = I.STUDENT_ID 
    AND stdnt.route_code = I.route_code 
    AND stdnt.DISPATCH_TYPE = I.DISPATCH_TYPE 
    AND stdnt.RUN_CODE = I.RUN_CODE 
    AND stdnt.STOP_ADDRESS = I.STOP_ADDRESS     
    AND stdnt.STOP_TIME = I.STOP_TIME)
WHEN MATCHED THEN UPDATE
                  SET stdnt.STOP_TEMPLATE_ID = I.STOP_TEMPLATE_ID

Answer 2

您可以通过使用一个UPDATE语句来实现此目的：

JOIN

链接到另一个可能有帮助的问题和答案：Update statement with inner join on Oracle。

另一种但类似的解决方案是从子查询获取更新值：

UPDATE(
    SELECT  
        stdnt.STOP_TEMPLATE_ID as old_val 
      , ST.STOP_TEMPLATE_ID as new_val
    FROM  
        STOP_TEMPLATE ST 
        JOIN TASK_TEMPLATE TT 
            ON ST.TASK_TEMPLATE_ID = TT.TASK_TEMPLATE_ID 
        JOIN RUN_TEMPLATE RT 
            ON ST.RUN_TEMPLATE_ID = RT.RUN_TEMPLATE_ID
        JOIN STUDENT stdnt
            ON (    TT.TASK_NAME = stdnt.route_code 
                AND TT.DISPATCH_TYPE = stdnt.DISPATCH_TYPE 
                AND RT.RUN_CODE = stdnt.RUN_CODE 
                AND ST.STOP_DESCRIPTION = stdnt.STOP_ADDRESS 
                AND CAST(ST.EXPECTED_ARRIVAL_TIME AS TIME(7)) = stdnt.STOP_TIME)
) t
SET t.old_val = t.new_val;

链接到具有类似解决方案的相关问题的答案： ORA-00933: SQL command not properly ended error on update statement

需要帮助，就像它是工作台一样从光标中选择

2 个答案: