Question

在过程调用的函数中使用两个sum（）时遇到了问题。输入的结果是分开的。我尝试过以下表格，功能和程序。附： - 当有一个总和（x）时，它工作正常。

 DROP TABLE MATCH;
    CREATE TABLE MATCH 
       (M_ID VARCHAR2 (4) NOT NULL,
        HT_ID VARCHAR2 (4),
        AT_ID VARCHAR2 (4),
        P_F NUMBER (3),
      P_A NUMBER (3));


INSERT INTO MATCH VALUES
('M01','T1', 'T2',  2, 0);

INSERT INTO MATCH VALUES
('M02','T1', 'T2',  1, 1);

INSERT INTO MATCH VALUES
('M03','T1', 'T2',  0, 2);

INSERT INTO MATCH VALUES
('M04','T1', 'T2', 0, 2);

INSERT INTO MATCH VALUES
('M05','T2', 'T1', 2, 0);

INSERT INTO MATCH VALUES
('M06','T2', 'T1',  0, 2);

INSERT INTO MATCH VALUES
('M07','T2', 'T1',  1, 2);

INSERT INTO MATCH VALUES
('M08','T2', 'T1',  0, 2);

临时表（将存储结果的地方）：

DROP TABLE RESULTS;
CREATE GLOBAL TEMPORARY TABLE RESULTS
(ht_id varchar2 (5),
 FINAL NUMBER (2))
 ON COMMIT PRESERVE ROWS;

 insert into RESULTS values('T1', NULL);
 insert into RESULTS values('T2', NULL);
 insert into RESULTS values('T3', NULL);
 insert into RESULTS values('T4', NULL);
 insert into RESULTS values('T5', NULL);

我申请的查询：

select
sum(case when HT_ID='T1' then P_F else 0 end) +
sum(case when AT_ID='T1' then P_A else 0 end)
from match;

返回9的结果，我在函数中应用了select查询，并创建了一个调用该函数的过程并将结果存储在临时表中。虽然在函数中完成的总和的结果是分开的（例如，对于T1为6，对于T2为3，但对于单独的T1，应该为9点）。

HT_ID      FINAL
----- ----------
T1             3
T2             6
T3             0
T4             0
T5             0

如何保留与查询相同的结果并将其输入临时表？ 如下所示：

HT_ID      FINAL
----- ----------
T1             9
T2             0
T3             0
T4             0
T5             0

这是我在功能和程序方面的尝试：

 drop function RESULTSFINAL;
 CREATE OR REPLACE FUNCTION RESULTSFINAL(i_HT_ID RESULTS.HT_ID%TYPE)

 RETURN VARCHAR2
 IS

 v_RESULTS_FINAL  RESULTS.FINAL%TYPE;


BEGIN
 select sum(case when HT_ID='T1' then P_F else 0 end)+ sum(case when AT_ID='T1' then    P_A else 0 end)
 INTO v_RESULTS_FINAL
 FROM MATCH
 WHERE HT_ID = i_HT_ID;

 IF v_RESULTS_FINAL IS NULL THEN
  v_RESULTS_FINAL := 0;
END IF;
RETURN v_RESULTS_FINAL;
END;
/

程序：

    CREATE OR REPLACE PROCEDURE FINALSCORES
    AS

    CURSOR c_RESULTS
    IS

     SELECT HT_ID
     FROM RESULTS;


    v_HT_ID  RESULTS.HT_ID%TYPE;
    v_RESULTS_FINAL  RESULTS.FINAL%TYPE;

    BEGIN  

    OPEN c_RESULTS;

     LOOP

    FETCH c_RESULTS INTO v_HT_ID;

    EXIT WHEN c_RESULTS%NOTFOUND;

     v_RESULTS_FINAL := RESULTSFINAL(v_HT_ID);

     UPDATE RESULTS
     SET FINAL = v_RESULTS_FINAL
     WHERE HT_ID = v_HT_ID;


   END LOOP;
   CLOSE c_RESULTS;

   END;
    /

执行FINALSCORES;

提前致谢。

Answer 1

select 
  sum(case when HT_ID=i_HT_ID then P_F else 0 end)
  + sum(case when AT_ID=i_HT_ID then P_A else 0 end)
INTO v_RESULTS_FINAL
FROM MATCH;

Answer 2

您也可以使用DECODE执行相同操作，如下所示：

CREATE OR REPLACE FUNCTION RESULTSFINAL(i_HT_ID RESULTS.HT_ID%TYPE)
 RETURN VARCHAR2
IS

    v_RESULTS_FINAL  RESULTS.FINAL%TYPE;
BEGIN

      select sum(decode(HT_ID,i_HT_ID,P_F,
                              decode(AT_ID,i_HT_ID,P_A,0)))
                into v_RESULTS_FINAL
      from match;

      IF v_RESULTS_FINAL IS NULL THEN
          v_RESULTS_FINAL := 0;
      END IF;

      RETURN v_RESULTS_FINAL;
END;
/

在函数/过程中实现时，选择总和查询不起作用

2 个答案: