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08.18.2008 at 02:18PM PDT, ID: 23657771
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7.1

SQL which does not insert duplicate records

Asked by football57 in AS / 400, DB2 Database

Tags: ,

I am a novice at SQL.  I am tried to insert records into AS400/DB2 file using a simple SQL statement but am getting duplicate records, even though I check if record/key already exists using the following statement:
insert into surveyor.CreatePN
select INVORP,INVDSC, INVTYP,'Active', INVGLC, ' ' , ' ',INVVND,INVORP, ' ', ' ', ' ', ' ', ' ' , INVPRC, 'None' , 'Revenue', INVUOM, 'Non-Returnable', ' ', ' ' , 'Days', INVSHL , INVSHL, 0 , 'No' , ' ' , ' ' , INVORP , ' ' , ' ', 0, ' ' , 0,  ' ' , ' ' , INVET2, digits(invchp)||'-'|| digits(invsec)|| '-'|| digits(invprt),' ', ' ' , ' ' from prplibr.pfinvms where invdel = ' ' and invet1 in ('EMB','ERJ','CRJ', ' ') where not exists
(select '1' from surveyor.CreatePN where PartNo=INVORP);

PartNo is for file CreatePN and INVORP for file pfinvms.
I am thinking this does not work because the records which are duplicating have not actually been added to the file until completion of the SQL statement processing.
So, likely I need a "loop" /routine to read the source file, check if exists in the destination file, insert from source.  I have not found an example in any solutions so far which read two files and update one.

Thank you for any assistance any of you may be able to provide.Start Free Trial
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About this solution

Zones: AS / 400, DB2 Database
Tags: AS400/iSeries SQL, SQL which does not insert duplicate records
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Solution Provided By: daveslash
Participating Experts: 2
Solution Grade: B
 
 
[+][-]08.18.2008 at 05:51PM PDT, ID: 22256535

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[+][-]08.19.2008 at 08:49AM PDT, ID: 22260923

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