如何获取非自动递增ID中的最后一个值？

Question

I am using two IDs DM_ID and id. DM_ID is auto incremented while id is not. I want to get the last value of id. I used mysqli_insert_id() to get it but i get the last of DM_ID. DM_ID and is in one table.

Answer 1

You need to fire a query to get that,

SELECT MAX(`id`) from `tbl_name`

Or if you need id of last inserted record,

SELECT `id` from `tbl_name` where `DM_ID` = mysqli_insert_id()

Answer 2

这样尝试

   select id from tablename order by DM_ID desc limit 1

Answer 3

SELECT id from tablename order by DM_ID desc limit 1