MySQL - INSERT INTO ... SELECT ... UNION

Question

我遇到了一个相当复杂的查询问题，我需要将一个表中的 id（基于重标准）存储到一个狭窄的备用表中以供将来参考，但我一直遇到错误的 sql 构造错误。

如果我自己运行以下查询，它可以正常工作：

(SELECT DISTINCT a.id FROM accounts AS a
WHERE a.createdate >= date_sub(now(), INTERVAL 1 YEAR)
AND a.email NOT LIKE '%gmail.com')
UNION DISTINCT
(SELECT DISTINCT a.id FROM accounts AS a
WHERE a.createdate < date_sub(now(), INTERVAL 1 YEAR)
AND a.email NOT LIKE '%yahoo.com') AND a.email NOT IN
(SELECT email FROM inactive_clients));

但是，如果我尝试像这样运行相同的查询：

INSERT INTO my_backup_table (account_id) VALUES ($aboveQuery);

我收到以下错误：

MySQL server version for the right syntax to use near 'UNION DISTINCT (SELECT DISTINCT a.id FROM accounts at line 1

我尝试了任意数量的括号排列，但仍然收到相同的错误。

Answer 1

您不能使用INSERT INTO tblname (...) VALUES ...语法

您必须使用INSERT INTO tblname (...) SELECT ...语法

尝试以下操作：

INSERT INTO my_backup_table (account_id)
SELECT id FROM
(
    (SELECT DISTINCT a.id FROM accounts AS a
    WHERE a.createdate >= date_sub(now(), INTERVAL 1 YEAR)
    AND a.email NOT LIKE '%gmail.com')
    UNION DISTINCT
    (SELECT DISTINCT a.id FROM accounts AS a
    WHERE a.createdate < date_sub(now(), INTERVAL 1 YEAR)
    AND a.email NOT LIKE '%yahoo.com') AND a.email NOT IN
    (SELECT email FROM inactive_clients))
) A;