RE: More Sql Questions

["Weatherly, Howard" <hweatherly@xxxxxxxxxxxx>]

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Vernon, I think that is what I wanted, the where to apply to the subselect
to get only those rows that match the rows in the main query without
descriptions! But I can see from you change that I might have well updated
the whole table! Yikes! not good! thanks.

-----Original Message-----
From: Vernon Hamberg [mailto:vhamberg@attbi.com]
Sent: Friday, March 29, 2002 1:57 AM
To: midrange-l@midrange.com
Subject: Re: More Sql Questions


I don't think you need the JOIN. You can have a correlated subquery, i.e.,
where the WHERE clause inside the subselect refers to a value or values
from the outer main query.

Also, the WHERE clause you have would apply to the subselect, not to the
UPDATE.

>Update XLCDBAP.UPC_XREF
>set MFR_PROD_DESC_9317=
>(select DESC from UDCIINP
>where MFR||ITM = MFR_ID_9336||MFR_ITM_9337)
>where MFR_PROD_DESC_9317 = ' '

At 02:17 PM 3/28/02 -0500, you wrote:
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>this format, some or all of this message may not be legible.
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>My brain is getting frazzled today and I am just not sure about this...
>
>We have a table UPC_XREF that has some rows that have a column which
>contains spaces, it should have been updated by a program that I ran but
>either those rows were duplicates (there are some) and did not get updated
>or I mucked something up! In either case I want to update the column
>MFR_PROD_DESC_9317 with the value in column DESC from another table
UDCIINP.
>
>This is the query I am planning to use, but I need another opinion on
wether
>I am going to get what I want, that is the column MFR_PROD_DESC_9317 in
>UPC_XREF where the value of the column is SPACE is updated with the DESC
>column from the corresponding row in UDCIINP  (I already know the value is
>there).
>
>Update XLCDBAP.UPC_XREF
>set MFR_PROD_DESC_9317=
>(select DESC from UDCIINP
>inner join DLCDBAP>UPC_XREF
>on MFR||ITM = MFR_ID_9336||MFR_ITM_9337
>where  MFR_PROD_DESC_9317 <>' ')
>
>Any insight or 2x4s upside my frazzled head appreciated!
>
>     Howard Weatherly
>        Systems Advisor
>Computer Task Group, Inc.
>
>hweatherly@dlis.dla.mil
>Howard_weatherly@ameritch.net
>Howard.Weatherly@ctg.com
>
>
>
>"luck favors those who prepare"
>
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