我已经在virtualbox中创建了空间,所以你可以看到这个免费的55GB。 但是,当我想删除分区2和分区5,我收到一条错误消息:rror deleting partition /dev/sda5: warning partition dev/sda5 is being used are you sure you want to continue,我无法做到这一点。 我试图用sudo fdisk
类别 记录要选择N个记录每一个类可以做: SELECT category, category_id, value FROM
(
SELECT category, value, row_number() OVER (PARTITION by category) as category_id
FROM myTable
)
WHERE category_id < N;
内部的