没有2列

Question

我有这样的查询,我理解语法不正确,但我将如何执行这样的"动作":

SELECT *
FROM accounts C
JOIN proxies P ON C.proxy_id = P.proxy_id
WHERE C.account_id NOT IN
    (SELECT send,
            receive
     FROM action
     WHERE send = C.account_id
       AND receive = ".UID.") LIMIT 1

我显示以下错误,Operand should contain 1 column(s)因为我知道我不应该NOT IN使用2列,所以我将如何进行这样的查询？

Answer 1

另一个解决方案是使用NOT EXISTS

WHERE NOT EXISTS
      (select null 
       from action 
       where 
        (send = c.account_id or receive = c.account_id)
        and receive = '.UID.')
LIMIT 1

仅供参考,你可以在NOT IN中有两个值,但它们必须在两侧.

where (x, y) not in (select (a, b) from t)