Re: UPDATE primary file with JOIN?

["R. Bruce Hoffman, Jr." <rbruceh@xxxxxxxxxxxxx>]

Yup.

Given two tables...

create table a (fielda char(1), fieldb char(2))
create table b (field1 char(1), field2 char(2))

You can do this.....

 update a
  set fieldb = (select field2 from b where field1 = fielda)

Notice that it is not a join and you can't do this in V4R2 and prior.


===========================================================
R. Bruce Hoffman, Jr.
 -- IBM Certified AS/400 Professional System Administrator
 -- IBM Certified AS/400 Professional Network Administrator

"The sum of all human knowledge is a fixed constant.
    It's the population that keeps growing!"

>-----Original Message-----
>From: Jack Crouch <j.crouch@ssss.com>
>To: 'MIDRANGE-L@midrange.com' <MIDRANGE-L@midrange.com>
>Date: Sunday, November 14, 1999 5:23 PM
>Subject: UPDATE primary file with JOIN?
>
>
>>I have enjoyed years of being able to use the UPDATE and DELETE commands
>>from ASC's Sequel products while using the JOIN clause.   Only the primary
>>file is updated.
>>
>>I have a new box without Sequel.    I am trying to get back to the crude
>>SQL/400 environment.   I read a book by James Coolbaugh called SQL/400 by
>>Example.   In here he has the mysterious statement:   "For our
>understanding
>>here, you need to know that starting with V4R3, you can update a field
with
>>information from another file."
>>
>>Well, that all he says about it.    And SQL/400 does not expect the JOIN
>>clause in the UPDATE.    Can someone elaborate on what he might have meant
>>by this?
>>
>>Thanks,
>>Jack D. Crouch
>>Director of Information Systems
>>Stewart & Stevenson
>>
>>Email: j.crouch@ssss.com
>>
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