The SQL implementation calls the latest 5 list thumbnails.

SQL implementation calls the latest 5 list thumbnails for help:
{dede:sql sql= "select Typename,typedir,typeimg from Dede_arctype where Id>7"}

[Field:typename/]

{/dede:sql}

I used this statement to bring up all the list thumbnails, but that would be to call all the thumbnails .... But now I want to add a feature that will allow him to invoke only the latest 5 messages.
I looked up some information to see a lot of people are in the back add the limit this statement: But I don't know anything about this, please help me write a code.

------Solution--------------------
SELECT typename,typedir,typeimg from Dede_arctype where id>7 order by time DESC LIMIT 5
------Solution--------------------
How the latest field is represented in order by field DESC LIMIT 5

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