Common Table Expressions are part of SELECT Statements but NOT of UPDATE
statement.
Nested sub-selects can be used in conjunction with UPDATE statements.
Mit freundlichen Grüßen / Best regards
Birgitta Hauser
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
-----Ursprüngliche Nachricht-----
Von: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] Im Auftrag von Jim
Oberholtzer
Gesendet: Tuesday, 29.3 2016 14:02
An: 'Non-Technical Discussion about the IBM i (AS/400 and iSeries)';
'Midrange Systems Technical Discussion'
Betreff: RE: Common Table Expressions with UPDATE
Dave,
What Rob is trying to get at is repost your question on
midangel@xxxxxxxxxxxx.
I've cross posted it for you. If you have not signed up for that list
please do and you'll see some of the best IBM i SQL experts in the world
work with your question.
--
Jim Oberholtzer
Agile Technology Architects
-----Original Message-----
From: Midrange-NonTech [mailto:midrange-nontech-bounces@xxxxxxxxxxxx] On
Behalf Of Rob Berendt
Sent: Tuesday, March 29, 2016 6:35 AM
To: Non-Technical Discussion about the IBM i (AS/400 and iSeries)
Subject: Re: Common Table Expressions with UPDATE
I think this definitely qualifies as a 'technical' topic and not a
'nontechnical' topic.
I am not nit picking. There are a lot of good technical people on the
technical list who simply do not have the time nor desire for some of the
stuff on the 'nontechnical' list.
http://lists.midrange.com/
Rob Berendt
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From: dlclark@xxxxxxxxxxxxxxxx
To: Midrange-Nontech <midrange-nontech@xxxxxxxxxxxx>
Date: 03/28/2016 06:10 PM
Subject: Common Table Expressions with UPDATE
Sent by: "Midrange-NonTech" <midrange-nontech-bounces@xxxxxxxxxxxx>
Sorry if this has been asked before -- I am new to this list. Are
Common Table Expressions (CTE) not supported for UPDATE statements? Since
I am getting Message: [SQL0199] Keyword UPDATE not expected. Valid tokens:
( SELECT VALUES. this leads to me to this conclusion -- unfortunately.
Tell me it ain't so.
With SequList (WaitId, ItemName, ItemType, ItemAttr, WaitSequ)
as (Select UTWAITLT_ID, Item_Name, Item_Type, Item_Attribute,
Wait_Sequence
From Waiting_List
Where Item_Name = 'UTWAITBRSM'
And Item_Type = '*MODULE'
And Item_Attribute = 'SQLRPM'
Order by Item_Name, Item_Type, Item_Attribute, Wait_Sequence
)
Update SequList as cte
Set cte.WaitSequ = NEXT VALUE FOR TEMP_SEQ Where cte.WaitId IN (Select
WaitId from SequList) Order by Item_Name, Item_Type, Item_Attribute,
Wait_Sequence;
Basically, what I am trying to accomplish is to resequence, in
place, a numeric column from 10 by 10. This is used in a priority list
where an entry's priority can change. Thus, for example, if there are 5
entries in a particular group and the entry at priority 30 is changed to
priority 5, I then want to resequence that group of entries from 10 such
that the changed entry will remain with the highest priority of 10 -- i.e.,
raising it from 30 to 10 -- and moving all other entries in the group down
by 10 for each existing entry. I've been able to resequence the column but
I have not been able to resequence according to the new priority sequence --
rather, it resequences by the primary identity key no
matter what I try. How can I accomplish this?
Sincerely,
Dave Clark
int.ext: 91078
direct: (937) 531-6378
home: (937) 751-3300
Winsupply Group Services
3110 Kettering Boulevard
Dayton, Ohio 45439 USA
(937) 294-5331
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