Visually this looks bad, see the pet pevee posts on formatting your code.

update t1

set a, b, c, d .f

from t1 a

join t2 b on a.poleid=b.poleid

join t3 c on b.t3id = c.t31d

where b.poleid =1

Doesn't this make it easier to read?

UPDATE t1

SET a, b, c, d .f -- not sure what you are doing here, you have table references but not setting anything

FROM t1 a

INNER JOIN t2 b ON

a.poleid=b.poleid

INNER JOIN t3 c ON

b.t3id = c.t31d

WHERE b.poleid = 1

;

Visually I would always have the table I am updating as the first table(t1). Your other joins shouldn't matter, someone will correct me if I'm wrong. But I think your WHERE statement will limit the data the same no matter what order you put the other two in.

I hope this is what you are trying to ask about, it still isn't clear.