Why does this happen

I have a line of php / sql query that I have been trying to edit to display only the articles with a specific section number, Finally I have gotten the script to give me some results but it seems to be giving me the opposite of what I am looking for. When I call the script it gives me every section except the one indicated. php lines below
@$outcome=mysql_query("SELECT * FROM articles WHERE section='19'<='$sectionid' AND adate<='$date' ORDER BY adate DESC");

from what I was told the "section='19' should display all articles from section 19, but I get every article except the articles from section 19. Does anybody know why? Is there somthing wrong with the scipt/querry?
(see also my post in the database section called "query / sort by problem, Absolut Engine", posted by me
Aaron

I don't understand this:

<='$sectionid'

try removing it.

I removed it, made it look like this
@$outcome=mysql_query("SELECT * FROM articles WHERE section='19' ORDER BY adate DESC");
and it works! Thanks.
If there are other huge obvious errors right in front of my face please let me know.
Thanks