Question

使用以下选择并想要进行更新，但在Microsoft SQL中查找语法有点混乱，这样容易得多！

选择如下所示，我想要做的是基于此选择c.allow_to_trade =＆＃39; Y＆＃39;到了＆＃39; N＆＃39;和其他标准。

SELECT MAX(Trade_date) "TRADE DATE",
  t.client,
  c.shortened_name,
  c.allow_to_trade "ACTIVE",
  C.GCD_NUMBER
FROM lib.trades t ,
  lib.client_address c
WHERE t.client       = c.client
AND c.allow_to_trade = 'Y'
GROUP BY C.GCD_NUMBER,
  t.client,
  c.shortened_name,
  c.allow_to_trade
HAVING MAX(trade_date) < '01-may-2012'

提前致谢

Answer 1

可以，请你试试这个：

UPDATE lib.client_address
SET allow_to_trade='N'
WHERE client IN
  (SELECT t.client
  FROM lib.trades t ,
    lib.client_address c
  WHERE t.client       = c.client
  AND c.allow_to_trade = 'Y'
  GROUP BY C.GCD_NUMBER,
    t.client,
    c.shortened_name,
    c.allow_to_trade
  HAVING MAX(trade_date) < '01-may-2012'
  );

基于select的Oracle Update Join

1 个答案: