PL/SQL：SQL語句被忽略 - 創建一個獲取編譯錯誤的過程

Question

有人可以指出我做錯了什麼嗎？我試圖創建一個基於以下各表的排序方法：

下面是代碼：

create or replace procedure rank 
(para_userid IN number, USERID IN number) 
is 
    rank number; 
    v_userid number; 
begin 
    v_userid := &USERID; 
    select v_userid, sum(decode(a.rank, 'SU', 25, 'EX', 9, 'VG', 5, 'G', 3, 'F',1) * b.tokens)/sum(b.tokens) 
into rank 
from a.GameID = b.GameID 
where para_userid = v_userid; 
return rank; 
end; 



declare 
x number; 
begin 
x:=rank(&USERID); 
DBMS_OUTPUT.PUT_LINE('User Ranking is: '||x); 
end; 
/

Answer 1

試試這個：

CREATE OR REPLACE FUNCTION f_rank (USERID IN number) RETURN NUMBER DETERMINISTIC IS 
    nRank number; 
BEGIN 
    SELECT SUM(DECODE(a.rank, 'SU', 25, 'EX', 9, 'VG', 5, 'G', 3, 'F',1) * b.tokens)/SUM(b.tokens) 
    INTO nRank 
    FROM a JOIN b ON a.GameID = b.GameID 
    WHERE 
     para_userid = USERID; 
    RETURN nRank; 
END f_rank; 



DECLARE 
    x number; 
BEGIN 
    x := f_rank(&USERID); 
    DBMS_OUTPUT.PUT_LINE('User Ranking is: '||x); 
END; 
/