MySQL query satisfies three conditions one is the maximum time of all rows

Source: Internet
Author: User
Tags dell xps 13 dell xps xps 13
MySQL query satisfies three conditions where one is the maximum time of all rows
Tables table structure is as follows:


Query statement:
SELECT * FROM table WHERE dtime = (select Max (Dtime) from final) and customer = ' Test ' and nbname = ' Dell XPS 13 '
We can't find anything.

But put the dtime= in the Where (...) This paragraph is removed and results come out.
After joining this paragraph, the results are not matched.
How to modify it.
------to solve the idea----------------------
What do you see in select Max (Dtime) from final?
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