太多的值錯誤

Question

SELECT t.trade_id, t.share_holder_id, t.broker_id 
    FROM trades t 
INNER JOIN share_holders sh ON t.share_holder_id = sh.share_holder_id 
INNER JOIN share_holder_shares shs ON shs.share_holder_id = sh.share_holder_id 
WHERE (t.share_amount > 5000 AND shs.amount < 0 OR t.transaction_type = 2) 
GROUP BY t.trade_id, t.share_holder_id, t.broker_id 
HAVING t.share_amount = (SELECT 
          SUM(DECODE(transaction_type, 1, share_amount)), 
          SUM(DECODE(transaction_type, 2, 0 - share_amount)) 
          FROM trades t1 
          WHERE t.share_id = t1.share_id 
          AND t.share_holder_id = t1.share_holder_id 
          AND t.transaction_time < t1.transaction_time 
          GROUP BY t.share_amount) 
ORDER BY t.trade_id, t.share_holder_id, t.broker_id; 

我想寫一個查詢，顯示所有股東每筆交易買入或賣出超過50,000股份或出售他們沒有的股票。我從子查詢中得到了太多的錯誤值。我如何解決他的??

Answer 1

您從子查詢返回2個值。確保子查詢只返回1個值。現在的方式是相當的寫作：

having t.share_amount = 50000 , -100 

不使任何意義

Answer 2

SELECT 
t.trade_id, 
t.share_holder_id, 
t.broker_id 
FROM 
trades t 
INNER JOIN 
share_holders sh 
ON 
t.share_holder_id = sh.share_holder_id 
    INNER JOIN 
    share_holder_shares shs 
    ON 
shs.share_holder_id = sh.share_holder_id 
WHERE 
    (t.share_amount >5000 AND shs.amount <0 OR t.transaction_type = 2) 
GROUP BY 
t.trade_id, 
t.share_holder_id, 
    t.broker_id 
    having 
    t.share_amount = 
(
    SELECT 
    SUM(DECODE(transaction_type,1,share_amount)) 
    FROM 
     trades t1 
     WHERE 
    t.share_id = t1.share_id AND 
     t.share_holder_id = t1.share_holder_id AND 
     t.transaction_time < t1.transaction_time 
    GROUP BY 
    t.share_amount) 
or t.share_amount = 
(
    SELECT 
    SUM(DECODE(transaction_type,2,0-share_amount)) 
    FROM 
     trades t1 
     WHERE 
    t.share_id = t1.share_id AND 
     t.share_holder_id = t1.share_holder_id AND 
     t.transaction_time < t1.transaction_time 
    GROUP BY 
    t.share_amount) 
ORDER BY 
t.trade_id, 
t.share_holder_id, 
t.broker_id 
    ;