Question

CREATE OR REPLACE AVG_MARK
(
    CROLL_NUM OUT TEST_TBL.ROLL_NUM%type,
    CNAME OUT TEST_TBL.NAME%type,
    CAVG_SALARY OUT TEST_TBL.SALARY%type
    CRANK OUT INTEGER
)
AS 
CURSOR C1 IS 
    SELECT ROLL_NUM, NAME, SALARY, RANK() OVER ORDER BY SALARY DESC) AS RNK
    FROM TEST_TBL;
BEGIN
OPEN C1;
    LOOP
        FETCH C1 INTO CROLL_NUM , CNAME , CAVG_SALARY , CRANK;
        DBMS_OUTPUT.PUT_LINE(CROLL_NUM  ||','|| CNAME ||','|| CAVG_SALARY ||','|| CRANK);
        EXIT WHEN C1%NOTFOUND
    END LOOP;
CLOSE C1;
END;

内部选择查询返回5条记录

我可以编译上面的proc，但执行它时说 “调用AVG_MARK的参数号码或类型错误”
在打开Proc并执行它时，将连接到数据库并显示记录，但最后一条记录会重复两次。

请就此问题提出建议

Answer 1

不确定如何将值传递给过程。我创建了一个像你一样的样本表和一些记录，它对我有用。我在程序中改变的只是修复了一些语法错误并在EXIT WHEN之后立即放置FETCH。这就是为什么你看到重复记录的原因。

CREATE OR replace PROCEDURE avg_mark (croll_num   OUT test_tbl.roll_num%TYPE, 
                                      cname       OUT test_tbl.name%TYPE, 
                                      cavg_salary OUT test_tbl.salary%TYPE, 
                                      crank       OUT INTEGER) 
AS 
  CURSOR c1 IS 
    SELECT roll_num, 
           name, 
           salary, 
           RANK() 
             over ( 
               ORDER BY salary DESC) AS RNK 
    FROM   test_tbl; 
BEGIN 
    OPEN c1; 

    LOOP 
        FETCH c1 INTO croll_num, cname, cavg_salary, crank; 

        EXIT WHEN c1%NOTFOUND; 

        dbms_output.put_line(croll_num 
                             ||',' 
                             || cname 
                             ||',' 
                             || cavg_salary 
                             ||',' 
                             || crank); 
    END LOOP; 

    CLOSE c1; 
END; 

/

这是调用。

DECLARE 
    v_croll_num   test_tbl.roll_num%TYPE; 
    v_cname       test_tbl.name%TYPE; 
    v_cavg_salary test_tbl.salary%TYPE; 
    v_crank       INTEGER; 
BEGIN 
    avg_mark(v_croll_num, v_cname, v_cavg_salary, v_crank); 
END; 

/

<强> O / P

1,Kaushik,1000000000,1
2,Rhodes,1000,2

DB Fiddle Demo

参数<proc_name>错误的数字或类型以及上次记录显示两次 - PL SQL

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