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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