Re: Table UPDATE statement

Thanks very much :-) this saves lot of time for my
update statements ....

-Venkatesh

--- Alban Hertroys <alban(at)magproductions(dot)nl> wrote:

> Venkatesh Babu wrote:
> > Hello,
> >
> > I need to update few rows of a table (call it 't')
> and
> > need to set just one column col1 (out of around
> 100
> > columns... to be exact, our table has 116
> columns).
> > The info about rows to be updated is present in
> > another table t2. t2 just contains 2 columns
> (row_key,
> > new value for col1).
> >
> > What is the best way to perform update? Can't I
> give
> > an update statement like: UPDATE t set
> > col1=t2.new_col1_val where t1.row_key = t2.row_key
> > ???? I think this kind of support is provided in
> db2,
> > but couldn't find how this can be done in
> postgres.
>
> You're close:
>
> UPDATE t1
> SET col1 = t2.new_col1
> FROM t2
> WHERE t1.row_key = t2.row_key;
>
> --
> Alban Hertroys
> MAG Productions
>
> T: +31(0)53 4346874
> F: +31(0)53 4346876
> E: alban(at)magproductions(dot)nl
> W: http://www.magproductions.nl
>

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