More Sql Questions

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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"