normalize data run

I have an table (DDT) that I have ID, Name as columns. Second table (DDC) I
have added the FK-ID column and I now want to update that null value with
the ID from DDT.
update DDC
set tableid =
(
select ddt.tableID from ddc
left join ddt
on ddc.Name = ddt.Name
)
select * from ddc
That gives to many returns, so adding Top 1 only gives #1 to all rows?
What do I need to do to update 30,000 rows from a set of 600+?
TIA
__StephenI got it straight.
(
select tableID from ddt
where ddt.tablename = ddc.tablename
)
"_Stephen" <srussell@.electracash.com> wrote in message
news:esvWGJpTGHA.1576@.tk2msftngp13.phx.gbl...
>I have an table (DDT) that I have ID, Name as columns. Second table (DDC)
>I have added the FK-ID column and I now want to update that null value with
>the ID from DDT.
> update DDC
> set tableid =
> (
> select ddt.tableID from ddc
> left join ddt
> on ddc.Name = ddt.Name
> )
> select * from ddc
> That gives to many returns, so adding Top 1 only gives #1 to all rows?
> What do I need to do to update 30,000 rows from a set of 600+?
> TIA
> __Stephen
>