mysql - 我的列表中的哪些条目在我的表中没有条目？

Question

如何在 MySQL 中执行类似的操作？

 (1274649,682844,872502,1016256) 
 INTERSECT 
 (SELECT id  FROM `users` WHERE `id` IN (1274649,682844,872502,1016256))

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改编自评论:

These four numbers are the IDs that I have now. I want to know which of these IDs do not have an an entry in my table, and how many of them don't have an entry?

Answer 1

select t.id from (
    select 1274649 as id union
    select 682844 union
    select 872502 union
    select 1016256
) t
left join users u on u.id = t.id
where u.id is null

这将返回那些在 users 表中没有对应 id 的 id。

添加这是评论中OP解释的答案:Which entries in my list do not have an entry in my table?