Oracle 过程中的游标并调用该过程

需要了解如何在过程中使用游标变量的帮助。并使用匿名块调用该过程6次以运行一组查询。想弄明白这件事一直让我头疼，事先谢谢你的帮助

    CREATE OR REPLACE PROCEDURE City_Jail_SP
     (lv_query IN NUMBER,
      lv_out out VARCHAR2)
     AS
     cursor qry_lvl IS
BEGIN
   OPEN qry_lvl;
   LOOP
   FETCH INTO
    IF chioce = 1 THEN SELECT AVG(COUNT(*))
    FROM crime_officers
    GROUP BY officer_id;
    
    ELSIF chioce = 2 THEN SELECT MIN(Fine_amount)
    FROM Crime_charges;  
    
    ELSIF chioce = 3 THEN COLUMN (hearing_date-date_charged) HEADING DAYS
    SELECT crime_id, Classification, date_charged, hearing_date,
    ( hearing_date-date_charged)
    FROM crimes
    WHERE hearing_date-date_charged >14;
    
    ELSIF choice = 4 THEN select cl.criminal_id, cl.last, cl.first, cc.Crime_code, cc.Fine_amount
    FROM criminals cl
    JOIN crimes cr
    ON cr.criminal_id = cl.criminal_id
    JOIN crime_charges cc
    ON cc.crime_id = cr.crime_id;
   
    ELSIF chioce = 5 THEN SELECT LAST, FIRST
    FROM officers JOIN crime_officers USING (officer_id)
    JOIN crimes USING (crime_id)
    GROUP BY (LAST, FIRST)
    HAVING COUNT(crime_id)>(SELECT AVG(COUNT(crime_id))
    FROM crimes JOIN crime_officers using (crime_id)
    GROUP BY officer_id);
    
    ELSIF choice = 6 THEN SELECT DISTINCT FIRST, LAST
    FROM criminals JOIN crimes USING (criminal_id)
    JOIN crime_charges USING (crime_id)
    GROUP BY (FIRST, LAST)
    HAVING COUNT(Criminal_ID)<(SELECT AVG(COUNT(Criminal_ID))
    FROM crimes JOIN criminals USING (Criminal_ID)
    GROUP BY Criminal_ID)
    ORDER BY FIRST, LAST;
END IF;
close qry_lvl;
END;    
/ 

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看起来您编写的代码应该被删除，以便重新开始

您开始声明游标，但从未完成 您没有声明任何游标变量来将游标的值存储到其中 无论如何，您更希望切换到循环游标，因为它使用起来更简单 你正在接近。。。什么 没有结束循环 您声明了IN和OUT参数，但从未使用过其中任何一个 IF中有很多select语句，几乎所有语句都返回不同的数据集。而且，它们中的任何一个都没有into子句。PL/SQL需要它，因此必须声明相当多的局部变量 错别字，错别字，错别字。。。是chioce还是choice？ 那个专栏是什么。。。你应该做什么？听起来像是与SQL*Plus相关的东西 也许你真的想使用refcursors。下面是一个基于Scott模式的简单示例。根据部门编号，我将返回不同的数据集

样本数据：

SQL> SELECT * FROM dept;

    DEPTNO DNAME          LOC
---------- -------------- -------------
        10 ACCOUNTING     NEW YORK
        20 RESEARCH       DALLAS
        30 SALES          CHICAGO
        40 OPERATIONS     BOSTON

过程模拟了您尝试执行的操作：

SQL> CREATE OR REPLACE PROCEDURE p_test (par_deptno  IN     NUMBER,
  2                                      par_rc         OUT SYS_REFCURSOR)
  3  IS
  4     l_dname  dept.dname%TYPE;
  5  BEGIN
  6     SELECT dname
  7       INTO l_dname
  8       FROM dept
  9      WHERE deptno = par_deptno;
 10
 11     IF l_dname = 'ACCOUNTING'
 12     THEN
 13        OPEN par_rc FOR SELECT d.dname, e.ename, e.job
 14                          FROM dept d
 15                               JOIN emp e
 16                                  ON     e.deptno = d.deptno
 17                                     AND d.deptno = par_deptno;
 18     ELSIF l_dname = 'SALES'
 19     THEN
 20        OPEN par_rc FOR SELECT e.ename, e.job, e.sal
 21                          FROM emp e
 22                         WHERE e.job = 'SALESMAN';
 23     END IF;
 24  END;
 25  /

Procedure created.

测试：

SQL> var l_rc refcursor
SQL> exec p_test(10, :l_rc);

PL/SQL procedure successfully completed.

SQL> print :l_rc

DNAME          ENAME      JOB
-------------- ---------- ---------
ACCOUNTING     CLARK      MANAGER
ACCOUNTING     KING       PRESIDENT
ACCOUNTING     MILLER     CLERK

SQL> exec p_test(30, :l_rc);

PL/SQL procedure successfully completed.

SQL> print :l_rc

ENAME      JOB              SAL
---------- --------- ----------
ALLEN      SALESMAN        1600
WARD       SALESMAN        1250
MARTIN     SALESMAN        1250
TURNER     SALESMAN        1500

SQL>

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请阅读一些基本的PL/SQL文档，您无法开始编码和编写自己的语法。这是。阅读它需要一些时间，但至少我希望你知道自己在做什么。

选择AVGCOUNT*按官员id分组；SQL语句中似乎缺少FROM子句。。。您是否尝试过在PL/SQL之外运行SQL语句来检查它们是否工作？我忘记在过程中添加FROM部分，但是当我单独运行查询时，它们工作@MT0FETCH INTO IF不是有效的构造。此外，似乎还有多个select语句，没有相应的into子句。此程序的要求是什么？