更新唯一表SQL

Question

你好，我有這張表。

ADDR  | STATE | ID 
CRA.20 15 | REP | (null) 
CRA.20 15 | REP | (null) 
CRA.20 15 | REP | (null) 
CRA.20 15 | PRI | RR_88_JK 

我需要改變這個表..

ADDR  | STATE | ID 
CRA.20 15 | REP | RR_88_JK 
CRA.20 15 | REP | RR_88_JK 
CRA.20 15 | REP | RR_88_JK 
CRA.20 15 | PRI | RR_88_JK 

我有這個QRY而不是功能。你有一個想法？

UPDATE TABLE_A A 
    SET a.ID = b.ID 
WHERE EXISTS 
      (SELECT b.ID 
       FROM TABLE_A B 
      WHERE a.ADDR = B.ADDR AND b.STATE = 'PRI') 
and A.STATE = 'REP'; 

謝謝。

Answer 1

你需要一個子查詢中設置的值：

UPDATE TABLE_A A 
    SET a.ID = (SELECT b.ID 
       FROM TABLE_A B 
       WHERE a.ADDR = B.ADDR AND b.STATE = 'PRI' AND rownum = 1 
      ) 
    WHERE EXISTS (SELECT b.ID 
       FROM TABLE_A B 
       WHERE a.ADDR = B.ADDR AND b.STATE = 'PRI' 
       ) AND 
     A.STATE = 'REP'; 

B僅在子查詢知，而不是在外部查詢。

Answer 2

下面將做你想要什麼：

UPDATE TABLE_A A 
    SET a.ID = (SELECT MIN(ID) 
       FROM TABLE_A 
       WHERE ID IS NOT NULL AND 
         STATE = 'PRI') 
    WHERE ID IS NULL AND 
     STATE = 'REP' 

好運。