Re: SQL Exists for Flag

[Charles Wilt <charles.wilt@xxxxxxxxx>]

Sorry, Vern's right...

Mine would give an 'X' if there was _NO_ match in B.

Charles


On Thu, Jun 20, 2013 at 12:26 PM, Charles Wilt <charles.wilt@xxxxxxxxx>wrote:

> select a.fld1, a.fld2, coalesce(b.fld1,'X')
> from tbla A left outer join tblb b on (a.fld1 = b.fld1)
>
> Charles
>
>
> On Thu, Jun 20, 2013 at 11:48 AM, Michael Ryan <michaelrtr@xxxxxxxxx>wrote:
>
> > Here's what I want to do...TableA has 4 columns. TableB shares a key value
> > with TableA. I want to produce this output in a select statement (to be
> > used from PHP fwiw):
> >
> > TableA.Fld1 TableA.Fld2 'X' (if TableA.Fld1 is in TableB).
> >
> > I've been trying combinations of a CTE, CASE, and exists, but I can't get
> > this to work. I'd like:
> >
> > A1 A2
> > A3 A4 X
> > A5 A6 X
> > A7 A8
> >
> > IOW, I want the values for TableA to show up, and an X if the
> > corresponding
> > key value is in TableB. This has to be easier than I'm making it out to
> > be.
> >
> > Thanks!
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