mariadb - 删除 MariaDB 中超过 900 行的所有内容

Question

这在 Mysql 中有效，但似乎 MariaDB 的语法不同，我试图删除前 900 个返回行（LIMIT 900）以上的任何内容：

DELETE FROM cronschedule NOT IN (SELECT * FROM cronschedule LIMIT 900);

尝试在 Maria 中执行此操作会返回以下错误：

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that 
corresponds to your MariaDB server version for the right syntax to use near 
'NOT IN (SELECT * FROM cronschedule LIMIT 900)' at line 1

那么我将如何在 Maria 中做到这一点？

Answer 1

我希望这比您对LEFT JOIN / IS NULL构造的回答更有效：

DELETE  cr.*
FROM    cronschedule cr
    JOIN
        (
        SELECT  id
        FROM    cronschedule ii
        ORDER BY
                id ASC
        LIMIT 1 OFFSET 900
        ) i2
ON      cr.id >= i2.id ;

Answer 2

这似乎有效

DELETE  cr.*
FROM    cronschedule cr
LEFT JOIN
        (
        SELECT  id
        FROM    cronschedule ii
        ORDER BY
                id ASC
        LIMIT 900
        ) i2
ON      cr.id = i2.id
WHERE   i2.id IS NULL;