RE: Combining SQL Updates

Is the where clause sub query a query over the same data being updated? Or is SOOSH00V03 a view that joins tables?

-Matt


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of dlclark@xxxxxxxxxxxxxxxx
Sent: Monday, January 29, 2018 3:45 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: Combining SQL Updates

"MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx> wrote on 01/29/2018
05:38:31 PM:

Case statement?


On Mon, Jan 29, 2018 at 2:31 PM, <dlclark@xxxxxxxxxxxxxxxx> wrote:

I have a curiosity question that hopefully might also teach
me more about SQL set-based processing. We added a foreign key to
an existing table. To initialize the new column, we ran the
following

two

updated statements. My question is whether there is a way to do
this

as a

single update set -- rather than processing the table twice?


Update SOOSH01T
Set SOWFSTSTID = (Select SOWFSTSTID from SOWFSTST
Where WRKFLWCDE = 'DELIVERED') Where
SOOSH01TID in (Select SOOSH01TID from SOOSH00V03
Where SHPSTSCDE = 'Closed');

Update SOOSH01T
Set SOWFSTSTID = (Select SOWFSTSTID from SOWFSTST
Where WRKFLWCDE = 'WAREHOUSEREADY') Where
SOOSH01TID in (Select SOOSH01TID from SOOSH00V03
Where SHPSTSCDE <> 'Closed');

I thought of a CASE statement in the SET clause but how would I make that specific to the WHERE for the second subselect? Meaning, how can I tell if the SET is for an OPEN order or for a CLOSED order?


Sincerely,

Dave Clark
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