Assumed field2 in the second and third table, do not contain NULL values and
an inner join is used and both sub-selects are merged with an UNION clause,
there is no need to convert any NULL value with COALESCE.
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!"
?Train people well enough so they can leave, treat them well enough so they
don't want to.? (Richard Branson)
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Krill, Coy
Sent: Freitag, 30. Juni 2017 20:09
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: RE: Using SQl to obtain a field value from one file or another
Select field1, f2.field2
From file-1 f1
Join file-2 f2 using (field1)
union
Select field1, f3.field2
From file-1 f1
Join file-3 f3 using (field1)
Order by field1
Assuming you don't want anything with a null field2 (based on your sample)
and assuming both field2s are compatible data types.
Then again you could have used coalesce(f2.field2, f3.field2) field2 in your
original query as well.
Several ways to skin this cat.
Coy Krill
Core Processing Administrator/Analyst
Washington Trust Bank
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan
Shore
Sent: 2017 June 30 10:50
To: midrange-l@xxxxxxxxxxxx
Subject: Using SQl to obtain a field value from one file or another
Importance: Low
Hi everyone
Before I forget - we are on V7r1
Happy 4th July weekend to the yanks
I may be pushing my luck - Friday afternoon before what could be a 4 day
weekend for many people But - here goes I will try and keep this as simple
as possible
I have 3 files
File-1 has one field with values
A
B
C
D
E
Etc.
File-2 contains 2 fields
Field 1 contains an alpha character with SOME of the values that are in
file-1 Field 2 is just data
File-3 also contains 2 fields
Field 1 contains an alpha character with SOME of the values that are in
file-1 Field 2 is just data
NOTE - the values A,B,C,D, E etc. will be in either File-2 or File-3 but NOT
both
How can I combine whats in file-1 with File-2 field 2 and File-3 field 2 but
in ONLY 2 columns For example - this is what I am looking to produce from an
SQL statement
A Field2 from File-2
B Field2 from File-2
C Field2 from File-3
D Field2 from File-3
E Field2 from File-2
I tried the following
Select File-1.Field1, File-2.Field2, File-3.Field2 from File-1 left join
File-2 on
File-1.Field1 = File-2.Field1
left join File-3 on
File-1.Field1 = File-3.Field1
But that results in three columns - not 2
As always - all responses gratefully accepted
Alan Shore
E-mail : ASHORE@xxxxxxxx
Phone [O] : (631) 200-5019
Phone [C] : (631) 880-8640
'If you're going through hell, keep going.'
Winston Churchill
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