Mysql select closest match from table
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I got a table that looks like that:

    ID|DATA
    1 | ok
    4 | ok2
    5 | kk
    6 | same ok
    7 | k
    9 | yeah

I want to find the closest match(round down) to my id. When I pass 

> id = 8

 I want to select the raw `7 | K`

How do I do that in mySql