mysql& php：查询结果的临时/虚拟ID？
我想知道是否可以为查询结果分配临时/虚拟ID？
例如，我将其作为查询
SELECT
pg_id AS ID,
pg_url AS URL,
pg_title AS Title,
pg_content_1 AS Content
FROM root_pages
ORDER BY pg_created DESC
输出：
ID URL Title Content
53 a A xxx
40 b B xxx
35 c C xxx
您可以看到 ID 之间的间隙 - 它们非常凌乱。我想知道我是否可以创建一个虚拟列或其他东西，这样我就可以
ID URL Title Content Virtual ID
53 a A xxx 3
40 b B xxx 2
35 c C xxx 1
通过下面这样的查询得到下面的输出，
SELECT
pg_id AS ID,
pg_url AS URL,
pg_title AS Title,
pg_content_1 AS Content
FROM root_pages
ORDER BY virtual_id DESC
这可能吗？
谢谢！
I wonder if it is possible to assign temporary/ virtual IDs for a query result?
For instance, I have this as my query,
SELECT
pg_id AS ID,
pg_url AS URL,
pg_title AS Title,
pg_content_1 AS Content
FROM root_pages
ORDER BY pg_created DESC
output:
ID URL Title Content
53 a A xxx
40 b B xxx
35 c C xxx
you can see the the gap between the IDs - they are very untidy. I wonder if I can make a virtual column or something so that I have the output below,
ID URL Title Content Virtual ID
53 a A xxx 3
40 b B xxx 2
35 c C xxx 1
from a query like this below,
SELECT
pg_id AS ID,
pg_url AS URL,
pg_title AS Title,
pg_content_1 AS Content
FROM root_pages
ORDER BY virtual_id DESC
is it possible??
thanks!
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如果你还坚持获取每一行的位置
看看这个答案
MySQL get row position in ORDER BY
If you still persist on getting the position of each row
take a look at this answer
MySQL get row position in ORDER BY